{"api_version":"1","generated_at":"2026-08-22T17:47:31+00:00","cve":"CVE-2022-49330","urls":{"html":"https://cve.report/CVE-2022-49330","api":"https://cve.report/api/cve/CVE-2022-49330.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2022-49330","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-49330"},"summary":{"title":"tcp: fix tcp_mtup_probe_success vs wrong snd_cwnd","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: fix tcp_mtup_probe_success vs wrong snd_cwnd\n\nsyzbot got a new report [1] finally pointing to a very old bug,\nadded in initial support for MTU probing.\n\ntcp_mtu_probe() has checks about starting an MTU probe if\ntcp_snd_cwnd(tp) >= 11.\n\nBut nothing prevents tcp_snd_cwnd(tp) to be reduced later\nand before the MTU probe succeeds.\n\nThis bug would lead to potential zero-divides.\n\nDebugging added in commit 40570375356c (\"tcp: add accessors\nto read/set tp->snd_cwnd\") has paid off :)\n\nWhile we are at it, address potential overflows in this code.\n\n[1]\nWARNING: CPU: 1 PID: 14132 at include/net/tcp.h:1219 tcp_mtup_probe_success+0x366/0x570 net/ipv4/tcp_input.c:2712\nModules linked in:\nCPU: 1 PID: 14132 Comm: syz-executor.2 Not tainted 5.18.0-syzkaller-07857-gbabf0bb978e3 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nRIP: 0010:tcp_snd_cwnd_set include/net/tcp.h:1219 [inline]\nRIP: 0010:tcp_mtup_probe_success+0x366/0x570 net/ipv4/tcp_input.c:2712\nCode: 74 08 48 89 ef e8 da 80 17 f9 48 8b 45 00 65 48 ff 80 80 03 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 aa b0 c5 f8 <0f> 0b e9 16 fe ff ff 48 8b 4c 24 08 80 e1 07 38 c1 0f 8c c7 fc ff\nRSP: 0018:ffffc900079e70f8 EFLAGS: 00010287\nRAX: ffffffff88c0f7f6 RBX: ffff8880756e7a80 RCX: 0000000000040000\nRDX: ffffc9000c6c4000 RSI: 0000000000031f9e RDI: 0000000000031f9f\nRBP: 0000000000000000 R08: ffffffff88c0f606 R09: ffffc900079e7520\nR10: ffffed101011226d R11: 1ffff1101011226c R12: 1ffff1100eadcf50\nR13: ffff8880756e72c0 R14: 1ffff1100eadcf89 R15: dffffc0000000000\nFS:  00007f643236e700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f1ab3f1e2a0 CR3: 0000000064fe7000 CR4: 00000000003506e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n tcp_clean_rtx_queue+0x223a/0x2da0 net/ipv4/tcp_input.c:3356\n tcp_ack+0x1962/0x3c90 net/ipv4/tcp_input.c:3861\n tcp_rcv_established+0x7c8/0x1ac0 net/ipv4/tcp_input.c:5973\n tcp_v6_do_rcv+0x57b/0x1210 net/ipv6/tcp_ipv6.c:1476\n sk_backlog_rcv include/net/sock.h:1061 [inline]\n __release_sock+0x1d8/0x4c0 net/core/sock.c:2849\n release_sock+0x5d/0x1c0 net/core/sock.c:3404\n sk_stream_wait_memory+0x700/0xdc0 net/core/stream.c:145\n tcp_sendmsg_locked+0x111d/0x3fc0 net/ipv4/tcp.c:1410\n tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1448\n sock_sendmsg_nosec net/socket.c:714 [inline]\n sock_sendmsg net/socket.c:734 [inline]\n __sys_sendto+0x439/0x5c0 net/socket.c:2119\n __do_sys_sendto net/socket.c:2131 [inline]\n __se_sys_sendto net/socket.c:2127 [inline]\n __x64_sys_sendto+0xda/0xf0 net/socket.c:2127\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f6431289109\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f643236e168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c\nRAX: ffffffffffffffda RBX: 00007f643139c100 RCX: 00007f6431289109\nRDX: 00000000d0d0c2ac RSI: 0000000020000080 RDI: 000000000000000a\nRBP: 00007f64312e308d R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fff372533af R14: 00007f643236e300 R15: 0000000000022000","state":"PUBLISHED","assigner":"Linux","published_at":"2025-02-26 07:01:09","updated_at":"2026-08-04 10:17:44"},"problem_types":["CWE-369"],"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":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/9ba2b4ac35935f05ac98cff722f36ba07d62270e","name":"https://git.kernel.org/stable/c/9ba2b4ac35935f05ac98cff722f36ba07d62270e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/11825765291a93d8e7f44230da67b9f607c777bf","name":"https://git.kernel.org/stable/c/11825765291a93d8e7f44230da67b9f607c777bf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/42726877453afdbe1508a8a96884ea907741d9a7","name":"https://git.kernel.org/stable/c/42726877453afdbe1508a8a96884ea907741d9a7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/38ca71a24cd4845021eed35fd2594d89dba9a5a8","name":"https://git.kernel.org/stable/c/38ca71a24cd4845021eed35fd2594d89dba9a5a8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/90385f2b65d0cd2b3b1ac8909f0cc6dd31062cfc","name":"https://git.kernel.org/stable/c/90385f2b65d0cd2b3b1ac8909f0cc6dd31062cfc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/602b338e3c3cd7f935f3f5011882961d074e5ac1","name":"https://git.kernel.org/stable/c/602b338e3c3cd7f935f3f5011882961d074e5ac1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aa7f333efd1138a68517a6a6a69ae540dd59d800","name":"https://git.kernel.org/stable/c/aa7f333efd1138a68517a6a6a69ae540dd59d800","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f2845e1504a3bc4f3381394f057e8b63cb5f3f7a","name":"https://git.kernel.org/stable/c/f2845e1504a3bc4f3381394f057e8b63cb5f3f7a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/29e13f6b38f0816af2012e0725507754e8f4569c","name":"https://git.kernel.org/stable/c/29e13f6b38f0816af2012e0725507754e8f4569c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-49330","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49330","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d424d5a674f782d0659a3b66d951f412901faee 29e13f6b38f0816af2012e0725507754e8f4569c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d424d5a674f782d0659a3b66d951f412901faee 42726877453afdbe1508a8a96884ea907741d9a7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d424d5a674f782d0659a3b66d951f412901faee f2845e1504a3bc4f3381394f057e8b63cb5f3f7a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d424d5a674f782d0659a3b66d951f412901faee 602b338e3c3cd7f935f3f5011882961d074e5ac1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d424d5a674f782d0659a3b66d951f412901faee 9ba2b4ac35935f05ac98cff722f36ba07d62270e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d424d5a674f782d0659a3b66d951f412901faee 90385f2b65d0cd2b3b1ac8909f0cc6dd31062cfc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d424d5a674f782d0659a3b66d951f412901faee aa7f333efd1138a68517a6a6a69ae540dd59d800 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d424d5a674f782d0659a3b66d951f412901faee 38ca71a24cd4845021eed35fd2594d89dba9a5a8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d424d5a674f782d0659a3b66d951f412901faee 11825765291a93d8e7f44230da67b9f607c777bf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.17","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.17 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.9.318 4.9.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.14.283 4.14.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.19.247 4.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.4.198 5.4.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.122 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.47 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.17.15 5.17.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.18.4 5.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.19 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2022","cve_id":"49330","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":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv4/tcp_input.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"29e13f6b38f0816af2012e0725507754e8f4569c","status":"affected","version":"5d424d5a674f782d0659a3b66d951f412901faee","versionType":"git"},{"lessThan":"42726877453afdbe1508a8a96884ea907741d9a7","status":"affected","version":"5d424d5a674f782d0659a3b66d951f412901faee","versionType":"git"},{"lessThan":"f2845e1504a3bc4f3381394f057e8b63cb5f3f7a","status":"affected","version":"5d424d5a674f782d0659a3b66d951f412901faee","versionType":"git"},{"lessThan":"602b338e3c3cd7f935f3f5011882961d074e5ac1","status":"affected","version":"5d424d5a674f782d0659a3b66d951f412901faee","versionType":"git"},{"lessThan":"9ba2b4ac35935f05ac98cff722f36ba07d62270e","status":"affected","version":"5d424d5a674f782d0659a3b66d951f412901faee","versionType":"git"},{"lessThan":"90385f2b65d0cd2b3b1ac8909f0cc6dd31062cfc","status":"affected","version":"5d424d5a674f782d0659a3b66d951f412901faee","versionType":"git"},{"lessThan":"aa7f333efd1138a68517a6a6a69ae540dd59d800","status":"affected","version":"5d424d5a674f782d0659a3b66d951f412901faee","versionType":"git"},{"lessThan":"38ca71a24cd4845021eed35fd2594d89dba9a5a8","status":"affected","version":"5d424d5a674f782d0659a3b66d951f412901faee","versionType":"git"},{"lessThan":"11825765291a93d8e7f44230da67b9f607c777bf","status":"affected","version":"5d424d5a674f782d0659a3b66d951f412901faee","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv4/tcp_input.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.17"},{"lessThan":"2.6.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"4.9.*","status":"unaffected","version":"4.9.318","versionType":"semver"},{"lessThanOrEqual":"4.14.*","status":"unaffected","version":"4.14.283","versionType":"semver"},{"lessThanOrEqual":"4.19.*","status":"unaffected","version":"4.19.247","versionType":"semver"},{"lessThanOrEqual":"5.4.*","status":"unaffected","version":"5.4.198","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.122","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.47","versionType":"semver"},{"lessThanOrEqual":"5.17.*","status":"unaffected","version":"5.17.15","versionType":"semver"},{"lessThanOrEqual":"5.18.*","status":"unaffected","version":"5.18.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"5.19","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.9.318","versionStartIncluding":"2.6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.14.283","versionStartIncluding":"2.6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.19.247","versionStartIncluding":"2.6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.4.198","versionStartIncluding":"2.6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.122","versionStartIncluding":"2.6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.47","versionStartIncluding":"2.6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.17.15","versionStartIncluding":"2.6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.18.4","versionStartIncluding":"2.6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.19","versionStartIncluding":"2.6.17","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: fix tcp_mtup_probe_success vs wrong snd_cwnd\n\nsyzbot got a new report [1] finally pointing to a very old bug,\nadded in initial support for MTU probing.\n\ntcp_mtu_probe() has checks about starting an MTU probe if\ntcp_snd_cwnd(tp) >= 11.\n\nBut nothing prevents tcp_snd_cwnd(tp) to be reduced later\nand before the MTU probe succeeds.\n\nThis bug would lead to potential zero-divides.\n\nDebugging added in commit 40570375356c (\"tcp: add accessors\nto read/set tp->snd_cwnd\") has paid off :)\n\nWhile we are at it, address potential overflows in this code.\n\n[1]\nWARNING: CPU: 1 PID: 14132 at include/net/tcp.h:1219 tcp_mtup_probe_success+0x366/0x570 net/ipv4/tcp_input.c:2712\nModules linked in:\nCPU: 1 PID: 14132 Comm: syz-executor.2 Not tainted 5.18.0-syzkaller-07857-gbabf0bb978e3 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nRIP: 0010:tcp_snd_cwnd_set include/net/tcp.h:1219 [inline]\nRIP: 0010:tcp_mtup_probe_success+0x366/0x570 net/ipv4/tcp_input.c:2712\nCode: 74 08 48 89 ef e8 da 80 17 f9 48 8b 45 00 65 48 ff 80 80 03 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 aa b0 c5 f8 <0f> 0b e9 16 fe ff ff 48 8b 4c 24 08 80 e1 07 38 c1 0f 8c c7 fc ff\nRSP: 0018:ffffc900079e70f8 EFLAGS: 00010287\nRAX: ffffffff88c0f7f6 RBX: ffff8880756e7a80 RCX: 0000000000040000\nRDX: ffffc9000c6c4000 RSI: 0000000000031f9e RDI: 0000000000031f9f\nRBP: 0000000000000000 R08: ffffffff88c0f606 R09: ffffc900079e7520\nR10: ffffed101011226d R11: 1ffff1101011226c R12: 1ffff1100eadcf50\nR13: ffff8880756e72c0 R14: 1ffff1100eadcf89 R15: dffffc0000000000\nFS:  00007f643236e700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f1ab3f1e2a0 CR3: 0000000064fe7000 CR4: 00000000003506e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n tcp_clean_rtx_queue+0x223a/0x2da0 net/ipv4/tcp_input.c:3356\n tcp_ack+0x1962/0x3c90 net/ipv4/tcp_input.c:3861\n tcp_rcv_established+0x7c8/0x1ac0 net/ipv4/tcp_input.c:5973\n tcp_v6_do_rcv+0x57b/0x1210 net/ipv6/tcp_ipv6.c:1476\n sk_backlog_rcv include/net/sock.h:1061 [inline]\n __release_sock+0x1d8/0x4c0 net/core/sock.c:2849\n release_sock+0x5d/0x1c0 net/core/sock.c:3404\n sk_stream_wait_memory+0x700/0xdc0 net/core/stream.c:145\n tcp_sendmsg_locked+0x111d/0x3fc0 net/ipv4/tcp.c:1410\n tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1448\n sock_sendmsg_nosec net/socket.c:714 [inline]\n sock_sendmsg net/socket.c:734 [inline]\n __sys_sendto+0x439/0x5c0 net/socket.c:2119\n __do_sys_sendto net/socket.c:2131 [inline]\n __se_sys_sendto net/socket.c:2127 [inline]\n __x64_sys_sendto+0xda/0xf0 net/socket.c:2127\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f6431289109\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f643236e168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c\nRAX: ffffffffffffffda RBX: 00007f643139c100 RCX: 00007f6431289109\nRDX: 00000000d0d0c2ac RSI: 0000000020000080 RDI: 000000000000000a\nRBP: 00007f64312e308d R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fff372533af R14: 00007f643236e300 R15: 0000000000022000"}],"metrics":[{"cvssV3_1":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-08-04T09:05:00.244Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/29e13f6b38f0816af2012e0725507754e8f4569c"},{"url":"https://git.kernel.org/stable/c/42726877453afdbe1508a8a96884ea907741d9a7"},{"url":"https://git.kernel.org/stable/c/f2845e1504a3bc4f3381394f057e8b63cb5f3f7a"},{"url":"https://git.kernel.org/stable/c/602b338e3c3cd7f935f3f5011882961d074e5ac1"},{"url":"https://git.kernel.org/stable/c/9ba2b4ac35935f05ac98cff722f36ba07d62270e"},{"url":"https://git.kernel.org/stable/c/90385f2b65d0cd2b3b1ac8909f0cc6dd31062cfc"},{"url":"https://git.kernel.org/stable/c/aa7f333efd1138a68517a6a6a69ae540dd59d800"},{"url":"https://git.kernel.org/stable/c/38ca71a24cd4845021eed35fd2594d89dba9a5a8"},{"url":"https://git.kernel.org/stable/c/11825765291a93d8e7f44230da67b9f607c777bf"}],"title":"tcp: fix tcp_mtup_probe_success vs wrong snd_cwnd","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2022-49330","datePublished":"2025-02-26T02:10:50.554Z","dateReserved":"2025-02-26T02:08:31.538Z","dateUpdated":"2026-08-04T09:05:00.244Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-02-26 07:01:09","lastModifiedDate":"2026-08-04 10:17:44","problem_types":["CWE-369"],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},{"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}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.17","versionEndExcluding":"4.9.318","matchCriteriaId":"24E3DB6B-4771-450A-A274-E8F8A4C11502"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"4.14.283","matchCriteriaId":"D6823775-2653-4644-A0D4-4E6E68F10C65"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"4.19.247","matchCriteriaId":"B8CFA0F4-2D75-41F4-9753-87944A08B53B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.198","matchCriteriaId":"3EC49633-14DE-4EBD-BB80-76AE2E3EABB9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.122","matchCriteriaId":"1B42AA01-44D8-4572-95E6-FF8E374CF9C5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.47","matchCriteriaId":"FC042EE3-4864-4325-BE0B-4BCDBF11AA61"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.17.15","matchCriteriaId":"53E7AA2E-2FB4-45CA-A22B-08B4EDBB51AD"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"5.18.4","matchCriteriaId":"FA6D643C-6D6A-4821-8A8D-B5776B8F0103"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2022","CveId":"49330","Ordinal":"1","Title":"tcp: fix tcp_mtup_probe_success vs wrong snd_cwnd","CVE":"CVE-2022-49330","Year":"2022"},"notes":[{"CveYear":"2022","CveId":"49330","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: fix tcp_mtup_probe_success vs wrong snd_cwnd\n\nsyzbot got a new report [1] finally pointing to a very old bug,\nadded in initial support for MTU probing.\n\ntcp_mtu_probe() has checks about starting an MTU probe if\ntcp_snd_cwnd(tp) >= 11.\n\nBut nothing prevents tcp_snd_cwnd(tp) to be reduced later\nand before the MTU probe succeeds.\n\nThis bug would lead to potential zero-divides.\n\nDebugging added in commit 40570375356c (\"tcp: add accessors\nto read/set tp->snd_cwnd\") has paid off :)\n\nWhile we are at it, address potential overflows in this code.\n\n[1]\nWARNING: CPU: 1 PID: 14132 at include/net/tcp.h:1219 tcp_mtup_probe_success+0x366/0x570 net/ipv4/tcp_input.c:2712\nModules linked in:\nCPU: 1 PID: 14132 Comm: syz-executor.2 Not tainted 5.18.0-syzkaller-07857-gbabf0bb978e3 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nRIP: 0010:tcp_snd_cwnd_set include/net/tcp.h:1219 [inline]\nRIP: 0010:tcp_mtup_probe_success+0x366/0x570 net/ipv4/tcp_input.c:2712\nCode: 74 08 48 89 ef e8 da 80 17 f9 48 8b 45 00 65 48 ff 80 80 03 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 aa b0 c5 f8 <0f> 0b e9 16 fe ff ff 48 8b 4c 24 08 80 e1 07 38 c1 0f 8c c7 fc ff\nRSP: 0018:ffffc900079e70f8 EFLAGS: 00010287\nRAX: ffffffff88c0f7f6 RBX: ffff8880756e7a80 RCX: 0000000000040000\nRDX: ffffc9000c6c4000 RSI: 0000000000031f9e RDI: 0000000000031f9f\nRBP: 0000000000000000 R08: ffffffff88c0f606 R09: ffffc900079e7520\nR10: ffffed101011226d R11: 1ffff1101011226c R12: 1ffff1100eadcf50\nR13: ffff8880756e72c0 R14: 1ffff1100eadcf89 R15: dffffc0000000000\nFS:  00007f643236e700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f1ab3f1e2a0 CR3: 0000000064fe7000 CR4: 00000000003506e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n tcp_clean_rtx_queue+0x223a/0x2da0 net/ipv4/tcp_input.c:3356\n tcp_ack+0x1962/0x3c90 net/ipv4/tcp_input.c:3861\n tcp_rcv_established+0x7c8/0x1ac0 net/ipv4/tcp_input.c:5973\n tcp_v6_do_rcv+0x57b/0x1210 net/ipv6/tcp_ipv6.c:1476\n sk_backlog_rcv include/net/sock.h:1061 [inline]\n __release_sock+0x1d8/0x4c0 net/core/sock.c:2849\n release_sock+0x5d/0x1c0 net/core/sock.c:3404\n sk_stream_wait_memory+0x700/0xdc0 net/core/stream.c:145\n tcp_sendmsg_locked+0x111d/0x3fc0 net/ipv4/tcp.c:1410\n tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1448\n sock_sendmsg_nosec net/socket.c:714 [inline]\n sock_sendmsg net/socket.c:734 [inline]\n __sys_sendto+0x439/0x5c0 net/socket.c:2119\n __do_sys_sendto net/socket.c:2131 [inline]\n __se_sys_sendto net/socket.c:2127 [inline]\n __x64_sys_sendto+0xda/0xf0 net/socket.c:2127\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f6431289109\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f643236e168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c\nRAX: ffffffffffffffda RBX: 00007f643139c100 RCX: 00007f6431289109\nRDX: 00000000d0d0c2ac RSI: 0000000020000080 RDI: 000000000000000a\nRBP: 00007f64312e308d R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fff372533af R14: 00007f643236e300 R15: 0000000000022000","Type":"Description","Title":"tcp: fix tcp_mtup_probe_success vs wrong snd_cwnd"}]}}}