{"api_version":"1","generated_at":"2026-08-07T08:01:19+00:00","cve":"CVE-2023-52845","urls":{"html":"https://cve.report/CVE-2023-52845","api":"https://cve.report/api/cve/CVE-2023-52845.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-52845","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-52845"},"summary":{"title":"tipc: Change nla_policy for bearer-related names to NLA_NUL_STRING","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: Change nla_policy for bearer-related names to NLA_NUL_STRING\n\nsyzbot reported the following uninit-value access issue [1]:\n\n=====================================================\nBUG: KMSAN: uninit-value in strlen lib/string.c:418 [inline]\nBUG: KMSAN: uninit-value in strstr+0xb8/0x2f0 lib/string.c:756\n strlen lib/string.c:418 [inline]\n strstr+0xb8/0x2f0 lib/string.c:756\n tipc_nl_node_reset_link_stats+0x3ea/0xb50 net/tipc/node.c:2595\n genl_family_rcv_msg_doit net/netlink/genetlink.c:971 [inline]\n genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline]\n genl_rcv_msg+0x11ec/0x1290 net/netlink/genetlink.c:1066\n netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2545\n genl_rcv+0x40/0x60 net/netlink/genetlink.c:1075\n netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]\n netlink_unicast+0xf47/0x1250 net/netlink/af_netlink.c:1368\n netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910\n sock_sendmsg_nosec net/socket.c:730 [inline]\n sock_sendmsg net/socket.c:753 [inline]\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595\n __sys_sendmsg net/socket.c:2624 [inline]\n __do_sys_sendmsg net/socket.c:2633 [inline]\n __se_sys_sendmsg net/socket.c:2631 [inline]\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nUninit was created at:\n slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767\n slab_alloc_node mm/slub.c:3478 [inline]\n kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523\n kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:559\n __alloc_skb+0x318/0x740 net/core/skbuff.c:650\n alloc_skb include/linux/skbuff.h:1286 [inline]\n netlink_alloc_large_skb net/netlink/af_netlink.c:1214 [inline]\n netlink_sendmsg+0xb34/0x13d0 net/netlink/af_netlink.c:1885\n sock_sendmsg_nosec net/socket.c:730 [inline]\n sock_sendmsg net/socket.c:753 [inline]\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595\n __sys_sendmsg net/socket.c:2624 [inline]\n __do_sys_sendmsg net/socket.c:2633 [inline]\n __se_sys_sendmsg net/socket.c:2631 [inline]\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nTIPC bearer-related names including link names must be null-terminated\nstrings. If a link name which is not null-terminated is passed through\nnetlink, strstr() and similar functions can cause buffer overrun. This\ncauses the above issue.\n\nThis patch changes the nla_policy for bearer-related names from NLA_STRING\nto NLA_NUL_STRING. This resolves the issue by ensuring that only\nnull-terminated strings are accepted as bearer-related names.\n\nsyzbot reported similar uninit-value issue related to bearer names [2]. The\nroot cause of this issue is that a non-null-terminated bearer name was\npassed. This patch also resolved this issue.","state":"PUBLISHED","assigner":"Linux","published_at":"2024-05-21 16:15:21","updated_at":"2026-08-04 10:18:45"},"problem_types":["CWE-908"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","data":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/abc1582119e8c4af14cedb0db6541fd603f45a04","name":"https://git.kernel.org/stable/c/abc1582119e8c4af14cedb0db6541fd603f45a04","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3907b89cd17fcc23e9a80789c36856f00ece0ba8","name":"https://git.kernel.org/stable/c/3907b89cd17fcc23e9a80789c36856f00ece0ba8","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4c731e98fe4d678e87ba3e4d45d3cf0a5a193dc4","name":"https://git.kernel.org/stable/c/4c731e98fe4d678e87ba3e4d45d3cf0a5a193dc4","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/560992f41c0cea44b7603bc9e6c73bffbf6b5709","name":"https://git.kernel.org/stable/c/560992f41c0cea44b7603bc9e6c73bffbf6b5709","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/19b3f72a41a8751e26bffc093bb7e1cef29ad579","name":"https://git.kernel.org/stable/c/19b3f72a41a8751e26bffc093bb7e1cef29ad579","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6744008c354bca2e4686a5b6056ee6b535d9f67d","name":"https://git.kernel.org/stable/c/6744008c354bca2e4686a5b6056ee6b535d9f67d","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2199260c42e6fbc5af8adae3bf78e623407c91b0","name":"https://git.kernel.org/stable/c/2199260c42e6fbc5af8adae3bf78e623407c91b0","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2426425d686b43adbc4f2f4a367b494f06f159d6","name":"https://git.kernel.org/stable/c/2426425d686b43adbc4f2f4a367b494f06f159d6","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b33d130f07f1decd756b849ab03c23d11d4dd294","name":"https://git.kernel.org/stable/c/b33d130f07f1decd756b849ab03c23d11d4dd294","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-52845","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52845","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0655f6a8635b1b66f2434d5556b1044c14b1ccaf 6744008c354bca2e4686a5b6056ee6b535d9f67d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0655f6a8635b1b66f2434d5556b1044c14b1ccaf 2426425d686b43adbc4f2f4a367b494f06f159d6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0655f6a8635b1b66f2434d5556b1044c14b1ccaf 2199260c42e6fbc5af8adae3bf78e623407c91b0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0655f6a8635b1b66f2434d5556b1044c14b1ccaf b33d130f07f1decd756b849ab03c23d11d4dd294 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0655f6a8635b1b66f2434d5556b1044c14b1ccaf 3907b89cd17fcc23e9a80789c36856f00ece0ba8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0655f6a8635b1b66f2434d5556b1044c14b1ccaf 4c731e98fe4d678e87ba3e4d45d3cf0a5a193dc4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0655f6a8635b1b66f2434d5556b1044c14b1ccaf abc1582119e8c4af14cedb0db6541fd603f45a04 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0655f6a8635b1b66f2434d5556b1044c14b1ccaf 560992f41c0cea44b7603bc9e6c73bffbf6b5709 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0655f6a8635b1b66f2434d5556b1044c14b1ccaf 19b3f72a41a8751e26bffc093bb7e1cef29ad579 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.14.330 4.14.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.19.299 4.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.4.261 5.4.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.201 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.139 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.63 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.5.12 6.5.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.2 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.7 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"52845","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2024-08-02T23:11:35.894Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"tags":["x_transferred"],"url":"https://git.kernel.org/stable/c/6744008c354bca2e4686a5b6056ee6b535d9f67d"},{"tags":["x_transferred"],"url":"https://git.kernel.org/stable/c/2426425d686b43adbc4f2f4a367b494f06f159d6"},{"tags":["x_transferred"],"url":"https://git.kernel.org/stable/c/2199260c42e6fbc5af8adae3bf78e623407c91b0"},{"tags":["x_transferred"],"url":"https://git.kernel.org/stable/c/b33d130f07f1decd756b849ab03c23d11d4dd294"},{"tags":["x_transferred"],"url":"https://git.kernel.org/stable/c/3907b89cd17fcc23e9a80789c36856f00ece0ba8"},{"tags":["x_transferred"],"url":"https://git.kernel.org/stable/c/4c731e98fe4d678e87ba3e4d45d3cf0a5a193dc4"},{"tags":["x_transferred"],"url":"https://git.kernel.org/stable/c/abc1582119e8c4af14cedb0db6541fd603f45a04"},{"tags":["x_transferred"],"url":"https://git.kernel.org/stable/c/560992f41c0cea44b7603bc9e6c73bffbf6b5709"},{"tags":["x_transferred"],"url":"https://git.kernel.org/stable/c/19b3f72a41a8751e26bffc093bb7e1cef29ad579"}],"title":"CVE Program Container"},{"metrics":[{"other":{"content":{"id":"CVE-2023-52845","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2024-09-10T15:36:31.255258Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2024-09-11T17:32:54.283Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/tipc/netlink.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"6744008c354bca2e4686a5b6056ee6b535d9f67d","status":"affected","version":"0655f6a8635b1b66f2434d5556b1044c14b1ccaf","versionType":"git"},{"lessThan":"2426425d686b43adbc4f2f4a367b494f06f159d6","status":"affected","version":"0655f6a8635b1b66f2434d5556b1044c14b1ccaf","versionType":"git"},{"lessThan":"2199260c42e6fbc5af8adae3bf78e623407c91b0","status":"affected","version":"0655f6a8635b1b66f2434d5556b1044c14b1ccaf","versionType":"git"},{"lessThan":"b33d130f07f1decd756b849ab03c23d11d4dd294","status":"affected","version":"0655f6a8635b1b66f2434d5556b1044c14b1ccaf","versionType":"git"},{"lessThan":"3907b89cd17fcc23e9a80789c36856f00ece0ba8","status":"affected","version":"0655f6a8635b1b66f2434d5556b1044c14b1ccaf","versionType":"git"},{"lessThan":"4c731e98fe4d678e87ba3e4d45d3cf0a5a193dc4","status":"affected","version":"0655f6a8635b1b66f2434d5556b1044c14b1ccaf","versionType":"git"},{"lessThan":"abc1582119e8c4af14cedb0db6541fd603f45a04","status":"affected","version":"0655f6a8635b1b66f2434d5556b1044c14b1ccaf","versionType":"git"},{"lessThan":"560992f41c0cea44b7603bc9e6c73bffbf6b5709","status":"affected","version":"0655f6a8635b1b66f2434d5556b1044c14b1ccaf","versionType":"git"},{"lessThan":"19b3f72a41a8751e26bffc093bb7e1cef29ad579","status":"affected","version":"0655f6a8635b1b66f2434d5556b1044c14b1ccaf","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/tipc/netlink.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.19"},{"lessThan":"3.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"4.14.*","status":"unaffected","version":"4.14.330","versionType":"semver"},{"lessThanOrEqual":"4.19.*","status":"unaffected","version":"4.19.299","versionType":"semver"},{"lessThanOrEqual":"5.4.*","status":"unaffected","version":"5.4.261","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.201","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.139","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.63","versionType":"semver"},{"lessThanOrEqual":"6.5.*","status":"unaffected","version":"6.5.12","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.2","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.7","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.14.330","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.19.299","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.4.261","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.201","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.139","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.63","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.5.12","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.2","versionStartIncluding":"3.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.7","versionStartIncluding":"3.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: Change nla_policy for bearer-related names to NLA_NUL_STRING\n\nsyzbot reported the following uninit-value access issue [1]:\n\n=====================================================\nBUG: KMSAN: uninit-value in strlen lib/string.c:418 [inline]\nBUG: KMSAN: uninit-value in strstr+0xb8/0x2f0 lib/string.c:756\n strlen lib/string.c:418 [inline]\n strstr+0xb8/0x2f0 lib/string.c:756\n tipc_nl_node_reset_link_stats+0x3ea/0xb50 net/tipc/node.c:2595\n genl_family_rcv_msg_doit net/netlink/genetlink.c:971 [inline]\n genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline]\n genl_rcv_msg+0x11ec/0x1290 net/netlink/genetlink.c:1066\n netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2545\n genl_rcv+0x40/0x60 net/netlink/genetlink.c:1075\n netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]\n netlink_unicast+0xf47/0x1250 net/netlink/af_netlink.c:1368\n netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910\n sock_sendmsg_nosec net/socket.c:730 [inline]\n sock_sendmsg net/socket.c:753 [inline]\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595\n __sys_sendmsg net/socket.c:2624 [inline]\n __do_sys_sendmsg net/socket.c:2633 [inline]\n __se_sys_sendmsg net/socket.c:2631 [inline]\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nUninit was created at:\n slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767\n slab_alloc_node mm/slub.c:3478 [inline]\n kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523\n kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:559\n __alloc_skb+0x318/0x740 net/core/skbuff.c:650\n alloc_skb include/linux/skbuff.h:1286 [inline]\n netlink_alloc_large_skb net/netlink/af_netlink.c:1214 [inline]\n netlink_sendmsg+0xb34/0x13d0 net/netlink/af_netlink.c:1885\n sock_sendmsg_nosec net/socket.c:730 [inline]\n sock_sendmsg net/socket.c:753 [inline]\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595\n __sys_sendmsg net/socket.c:2624 [inline]\n __do_sys_sendmsg net/socket.c:2633 [inline]\n __se_sys_sendmsg net/socket.c:2631 [inline]\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nTIPC bearer-related names including link names must be null-terminated\nstrings. If a link name which is not null-terminated is passed through\nnetlink, strstr() and similar functions can cause buffer overrun. This\ncauses the above issue.\n\nThis patch changes the nla_policy for bearer-related names from NLA_STRING\nto NLA_NUL_STRING. This resolves the issue by ensuring that only\nnull-terminated strings are accepted as bearer-related names.\n\nsyzbot reported similar uninit-value issue related to bearer names [2]. The\nroot cause of this issue is that a non-null-terminated bearer name was\npassed. This patch also resolved this issue."}],"metrics":[{"cvssV3_1":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-08-04T09:12:08.889Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/6744008c354bca2e4686a5b6056ee6b535d9f67d"},{"url":"https://git.kernel.org/stable/c/2426425d686b43adbc4f2f4a367b494f06f159d6"},{"url":"https://git.kernel.org/stable/c/2199260c42e6fbc5af8adae3bf78e623407c91b0"},{"url":"https://git.kernel.org/stable/c/b33d130f07f1decd756b849ab03c23d11d4dd294"},{"url":"https://git.kernel.org/stable/c/3907b89cd17fcc23e9a80789c36856f00ece0ba8"},{"url":"https://git.kernel.org/stable/c/4c731e98fe4d678e87ba3e4d45d3cf0a5a193dc4"},{"url":"https://git.kernel.org/stable/c/abc1582119e8c4af14cedb0db6541fd603f45a04"},{"url":"https://git.kernel.org/stable/c/560992f41c0cea44b7603bc9e6c73bffbf6b5709"},{"url":"https://git.kernel.org/stable/c/19b3f72a41a8751e26bffc093bb7e1cef29ad579"}],"title":"tipc: Change nla_policy for bearer-related names to NLA_NUL_STRING","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2023-52845","datePublished":"2024-05-21T15:31:43.181Z","dateReserved":"2024-05-21T15:19:24.254Z","dateUpdated":"2026-08-04T09:12:08.889Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2024-05-21 16:15:21","lastModifiedDate":"2026-08-04 10:18:45","problem_types":["CWE-908"],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.2},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2024-09-10T15:36:31.255258Z","id":"CVE-2023-52845","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"4.14.330","matchCriteriaId":"D55230F7-7217-4456-9084-D546ABA9C781"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"4.19.299","matchCriteriaId":"F51D1457-86F8-4A6C-A7B9-323058B3C5E8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.261","matchCriteriaId":"286E50BB-5A21-49BA-A6E5-526C72ADFE34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.201","matchCriteriaId":"AF1ADC4E-CCC4-498A-876F-5136DDD36C1D"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.139","matchCriteriaId":"81424D14-B38F-47B3-A1B8-BC3B60BB96EA"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.63","matchCriteriaId":"80E1EA7E-2788-466C-9FFB-34AFA1B052F0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.5.12","matchCriteriaId":"825F64D9-E99F-49AA-8A7B-EF7C2965C5B2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.6.2","matchCriteriaId":"4CBFF885-A4D3-4F21-B6FD-4D770034C048"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2023","CveId":"52845","Ordinal":"1","Title":"tipc: Change nla_policy for bearer-related names to NLA_NUL_STRI","CVE":"CVE-2023-52845","Year":"2023"},"notes":[{"CveYear":"2023","CveId":"52845","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: Change nla_policy for bearer-related names to NLA_NUL_STRING\n\nsyzbot reported the following uninit-value access issue [1]:\n\n=====================================================\nBUG: KMSAN: uninit-value in strlen lib/string.c:418 [inline]\nBUG: KMSAN: uninit-value in strstr+0xb8/0x2f0 lib/string.c:756\n strlen lib/string.c:418 [inline]\n strstr+0xb8/0x2f0 lib/string.c:756\n tipc_nl_node_reset_link_stats+0x3ea/0xb50 net/tipc/node.c:2595\n genl_family_rcv_msg_doit net/netlink/genetlink.c:971 [inline]\n genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline]\n genl_rcv_msg+0x11ec/0x1290 net/netlink/genetlink.c:1066\n netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2545\n genl_rcv+0x40/0x60 net/netlink/genetlink.c:1075\n netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]\n netlink_unicast+0xf47/0x1250 net/netlink/af_netlink.c:1368\n netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910\n sock_sendmsg_nosec net/socket.c:730 [inline]\n sock_sendmsg net/socket.c:753 [inline]\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595\n __sys_sendmsg net/socket.c:2624 [inline]\n __do_sys_sendmsg net/socket.c:2633 [inline]\n __se_sys_sendmsg net/socket.c:2631 [inline]\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nUninit was created at:\n slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767\n slab_alloc_node mm/slub.c:3478 [inline]\n kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523\n kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:559\n __alloc_skb+0x318/0x740 net/core/skbuff.c:650\n alloc_skb include/linux/skbuff.h:1286 [inline]\n netlink_alloc_large_skb net/netlink/af_netlink.c:1214 [inline]\n netlink_sendmsg+0xb34/0x13d0 net/netlink/af_netlink.c:1885\n sock_sendmsg_nosec net/socket.c:730 [inline]\n sock_sendmsg net/socket.c:753 [inline]\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2541\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2595\n __sys_sendmsg net/socket.c:2624 [inline]\n __do_sys_sendmsg net/socket.c:2633 [inline]\n __se_sys_sendmsg net/socket.c:2631 [inline]\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2631\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nTIPC bearer-related names including link names must be null-terminated\nstrings. If a link name which is not null-terminated is passed through\nnetlink, strstr() and similar functions can cause buffer overrun. This\ncauses the above issue.\n\nThis patch changes the nla_policy for bearer-related names from NLA_STRING\nto NLA_NUL_STRING. This resolves the issue by ensuring that only\nnull-terminated strings are accepted as bearer-related names.\n\nsyzbot reported similar uninit-value issue related to bearer names [2]. The\nroot cause of this issue is that a non-null-terminated bearer name was\npassed. This patch also resolved this issue.","Type":"Description","Title":"tipc: Change nla_policy for bearer-related names to NLA_NUL_STRI"}]}}}