{"api_version":"1","generated_at":"2026-11-10T17:39:24+00:00","cve":"CVE-2024-56372","urls":{"html":"https://cve.report/CVE-2024-56372","api":"https://cve.report/api/cve/CVE-2024-56372.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2024-56372","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-56372"},"summary":{"title":"net: tun: fix tun_napi_alloc_frags()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tun: fix tun_napi_alloc_frags()\n\nsyzbot reported the following crash [1]\n\nIssue came with the blamed commit. Instead of going through\nall the iov components, we keep using the first one\nand end up with a malformed skb.\n\n[1]\n\nkernel BUG at net/core/skbuff.c:2849 !\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\nCPU: 0 UID: 0 PID: 6230 Comm: syz-executor132 Not tainted 6.13.0-rc1-syzkaller-00407-g96b6fcc0ee41 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024\n RIP: 0010:__pskb_pull_tail+0x1568/0x1570 net/core/skbuff.c:2848\nCode: 38 c1 0f 8c 32 f1 ff ff 4c 89 f7 e8 92 96 74 f8 e9 25 f1 ff ff e8 e8 ae 09 f8 48 8b 5c 24 08 e9 eb fb ff ff e8 d9 ae 09 f8 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90\nRSP: 0018:ffffc90004cbef30 EFLAGS: 00010293\nRAX: ffffffff8995c347 RBX: 00000000fffffff2 RCX: ffff88802cf45a00\nRDX: 0000000000000000 RSI: 00000000fffffff2 RDI: 0000000000000000\nRBP: ffff88807df0c06a R08: ffffffff8995b084 R09: 1ffff1100fbe185c\nR10: dffffc0000000000 R11: ffffed100fbe185d R12: ffff888076e85d50\nR13: ffff888076e85c80 R14: ffff888076e85cf4 R15: ffff888076e85c80\nFS:  00007f0dca6ea6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f0dca6ead58 CR3: 00000000119da000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n  skb_cow_data+0x2da/0xcb0 net/core/skbuff.c:5284\n  tipc_aead_decrypt net/tipc/crypto.c:894 [inline]\n  tipc_crypto_rcv+0x402/0x24e0 net/tipc/crypto.c:1844\n  tipc_rcv+0x57e/0x12a0 net/tipc/node.c:2109\n  tipc_l2_rcv_msg+0x2bd/0x450 net/tipc/bearer.c:668\n  __netif_receive_skb_list_ptype net/core/dev.c:5720 [inline]\n  __netif_receive_skb_list_core+0x8b7/0x980 net/core/dev.c:5762\n  __netif_receive_skb_list net/core/dev.c:5814 [inline]\n  netif_receive_skb_list_internal+0xa51/0xe30 net/core/dev.c:5905\n  gro_normal_list include/net/gro.h:515 [inline]\n  napi_complete_done+0x2b5/0x870 net/core/dev.c:6256\n  napi_complete include/linux/netdevice.h:567 [inline]\n  tun_get_user+0x2ea0/0x4890 drivers/net/tun.c:1982\n  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2057\n do_iter_readv_writev+0x600/0x880\n  vfs_writev+0x376/0xba0 fs/read_write.c:1050\n  do_writev+0x1b6/0x360 fs/read_write.c:1096\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f","state":"PUBLISHED","assigner":"Linux","published_at":"2025-01-11 13:15:28","updated_at":"2026-11-05 21:17:35"},"problem_types":["CWE-476"],"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"}}],"references":[{"url":"https://git.kernel.org/stable/c/4f393ea1e2f9c3b646d00572dd92c48b1869c65f","name":"https://git.kernel.org/stable/c/4f393ea1e2f9c3b646d00572dd92c48b1869c65f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/efe74dd58a72bd987b158142c904b7ef2ad132e2","name":"https://git.kernel.org/stable/c/efe74dd58a72bd987b158142c904b7ef2ad132e2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/429fde2d81bcef0ebab002215358955704586457","name":"https://git.kernel.org/stable/c/429fde2d81bcef0ebab002215358955704586457","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2024-56372","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56372","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected de4f5fed3f231a8ff4790bf52975f847b95b85ea efe74dd58a72bd987b158142c904b7ef2ad132e2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected de4f5fed3f231a8ff4790bf52975f847b95b85ea 4f393ea1e2f9c3b646d00572dd92c48b1869c65f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected de4f5fed3f231a8ff4790bf52975f847b95b85ea 429fde2d81bcef0ebab002215358955704586457 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.4","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.68 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.7 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.13 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2024","cve_id":"56372","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":[{"metrics":[{"other":{"content":{"id":"CVE-2024-56372","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-11-05T20:28:43.747141Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-11-05T20:31:23.884Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/tun.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"efe74dd58a72bd987b158142c904b7ef2ad132e2","status":"affected","version":"de4f5fed3f231a8ff4790bf52975f847b95b85ea","versionType":"git"},{"lessThan":"4f393ea1e2f9c3b646d00572dd92c48b1869c65f","status":"affected","version":"de4f5fed3f231a8ff4790bf52975f847b95b85ea","versionType":"git"},{"lessThan":"429fde2d81bcef0ebab002215358955704586457","status":"affected","version":"de4f5fed3f231a8ff4790bf52975f847b95b85ea","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/tun.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.4"},{"lessThan":"6.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.68","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.13","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.68","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.7","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.13","versionStartIncluding":"6.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tun: fix tun_napi_alloc_frags()\n\nsyzbot reported the following crash [1]\n\nIssue came with the blamed commit. Instead of going through\nall the iov components, we keep using the first one\nand end up with a malformed skb.\n\n[1]\n\nkernel BUG at net/core/skbuff.c:2849 !\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\nCPU: 0 UID: 0 PID: 6230 Comm: syz-executor132 Not tainted 6.13.0-rc1-syzkaller-00407-g96b6fcc0ee41 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024\n RIP: 0010:__pskb_pull_tail+0x1568/0x1570 net/core/skbuff.c:2848\nCode: 38 c1 0f 8c 32 f1 ff ff 4c 89 f7 e8 92 96 74 f8 e9 25 f1 ff ff e8 e8 ae 09 f8 48 8b 5c 24 08 e9 eb fb ff ff e8 d9 ae 09 f8 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90\nRSP: 0018:ffffc90004cbef30 EFLAGS: 00010293\nRAX: ffffffff8995c347 RBX: 00000000fffffff2 RCX: ffff88802cf45a00\nRDX: 0000000000000000 RSI: 00000000fffffff2 RDI: 0000000000000000\nRBP: ffff88807df0c06a R08: ffffffff8995b084 R09: 1ffff1100fbe185c\nR10: dffffc0000000000 R11: ffffed100fbe185d R12: ffff888076e85d50\nR13: ffff888076e85c80 R14: ffff888076e85cf4 R15: ffff888076e85c80\nFS:  00007f0dca6ea6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f0dca6ead58 CR3: 00000000119da000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n  skb_cow_data+0x2da/0xcb0 net/core/skbuff.c:5284\n  tipc_aead_decrypt net/tipc/crypto.c:894 [inline]\n  tipc_crypto_rcv+0x402/0x24e0 net/tipc/crypto.c:1844\n  tipc_rcv+0x57e/0x12a0 net/tipc/node.c:2109\n  tipc_l2_rcv_msg+0x2bd/0x450 net/tipc/bearer.c:668\n  __netif_receive_skb_list_ptype net/core/dev.c:5720 [inline]\n  __netif_receive_skb_list_core+0x8b7/0x980 net/core/dev.c:5762\n  __netif_receive_skb_list net/core/dev.c:5814 [inline]\n  netif_receive_skb_list_internal+0xa51/0xe30 net/core/dev.c:5905\n  gro_normal_list include/net/gro.h:515 [inline]\n  napi_complete_done+0x2b5/0x870 net/core/dev.c:6256\n  napi_complete include/linux/netdevice.h:567 [inline]\n  tun_get_user+0x2ea0/0x4890 drivers/net/tun.c:1982\n  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2057\n do_iter_readv_writev+0x600/0x880\n  vfs_writev+0x376/0xba0 fs/read_write.c:1050\n  do_writev+0x1b6/0x360 fs/read_write.c:1096\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f"}],"providerMetadata":{"dateUpdated":"2026-05-11T20:54:00.801Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/efe74dd58a72bd987b158142c904b7ef2ad132e2"},{"url":"https://git.kernel.org/stable/c/4f393ea1e2f9c3b646d00572dd92c48b1869c65f"},{"url":"https://git.kernel.org/stable/c/429fde2d81bcef0ebab002215358955704586457"}],"title":"net: tun: fix tun_napi_alloc_frags()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2024-56372","datePublished":"2025-01-11T12:35:47.256Z","dateReserved":"2025-01-11T12:34:02.635Z","dateUpdated":"2026-11-05T20:31:23.884Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-01-11 13:15:28","lastModifiedDate":"2026-11-05 21:17:35","problem_types":["CWE-476"],"metrics":{"cvssMetricV31":[{"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":"2026-11-05T20:28:43.747141Z","id":"CVE-2024-56372","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":"6.4","versionEndExcluding":"6.6.68","matchCriteriaId":"DA073B86-58FC-4698-B82C-6B0561369002"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.7","matchCriteriaId":"811AC89A-14AC-49FA-9B54-E99526F1CA47"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*","matchCriteriaId":"62567B3C-6CEE-46D0-BC2E-B3717FBF7D13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*","matchCriteriaId":"5A073481-106D-4B15-B4C7-FB0213B8E1D4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*","matchCriteriaId":"DE491969-75AE-4A6B-9A58-8FC5AF98798F"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2024","CveId":"56372","Ordinal":"1","Title":"net: tun: fix tun_napi_alloc_frags()","CVE":"CVE-2024-56372","Year":"2024"},"notes":[{"CveYear":"2024","CveId":"56372","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tun: fix tun_napi_alloc_frags()\n\nsyzbot reported the following crash [1]\n\nIssue came with the blamed commit. Instead of going through\nall the iov components, we keep using the first one\nand end up with a malformed skb.\n\n[1]\n\nkernel BUG at net/core/skbuff.c:2849 !\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\nCPU: 0 UID: 0 PID: 6230 Comm: syz-executor132 Not tainted 6.13.0-rc1-syzkaller-00407-g96b6fcc0ee41 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024\n RIP: 0010:__pskb_pull_tail+0x1568/0x1570 net/core/skbuff.c:2848\nCode: 38 c1 0f 8c 32 f1 ff ff 4c 89 f7 e8 92 96 74 f8 e9 25 f1 ff ff e8 e8 ae 09 f8 48 8b 5c 24 08 e9 eb fb ff ff e8 d9 ae 09 f8 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90\nRSP: 0018:ffffc90004cbef30 EFLAGS: 00010293\nRAX: ffffffff8995c347 RBX: 00000000fffffff2 RCX: ffff88802cf45a00\nRDX: 0000000000000000 RSI: 00000000fffffff2 RDI: 0000000000000000\nRBP: ffff88807df0c06a R08: ffffffff8995b084 R09: 1ffff1100fbe185c\nR10: dffffc0000000000 R11: ffffed100fbe185d R12: ffff888076e85d50\nR13: ffff888076e85c80 R14: ffff888076e85cf4 R15: ffff888076e85c80\nFS:  00007f0dca6ea6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f0dca6ead58 CR3: 00000000119da000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n  skb_cow_data+0x2da/0xcb0 net/core/skbuff.c:5284\n  tipc_aead_decrypt net/tipc/crypto.c:894 [inline]\n  tipc_crypto_rcv+0x402/0x24e0 net/tipc/crypto.c:1844\n  tipc_rcv+0x57e/0x12a0 net/tipc/node.c:2109\n  tipc_l2_rcv_msg+0x2bd/0x450 net/tipc/bearer.c:668\n  __netif_receive_skb_list_ptype net/core/dev.c:5720 [inline]\n  __netif_receive_skb_list_core+0x8b7/0x980 net/core/dev.c:5762\n  __netif_receive_skb_list net/core/dev.c:5814 [inline]\n  netif_receive_skb_list_internal+0xa51/0xe30 net/core/dev.c:5905\n  gro_normal_list include/net/gro.h:515 [inline]\n  napi_complete_done+0x2b5/0x870 net/core/dev.c:6256\n  napi_complete include/linux/netdevice.h:567 [inline]\n  tun_get_user+0x2ea0/0x4890 drivers/net/tun.c:1982\n  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2057\n do_iter_readv_writev+0x600/0x880\n  vfs_writev+0x376/0xba0 fs/read_write.c:1050\n  do_writev+0x1b6/0x360 fs/read_write.c:1096\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f","Type":"Description","Title":"net: tun: fix tun_napi_alloc_frags()"}]}}}