{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2022-49330", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49330", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-02-26T02:10:50.554Z", "updatedAt": "2026-08-05T08:54:45.858Z", "importedAt": "2026-10-24T01:56:49.724Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "tcp: fix tcp_mtup_probe_success vs wrong snd_cwnd", "summary": "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 \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", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "5d424d5a674f782d0659a3b66d951f412901faee", "status": "affected", "versionType": "git", "lessThan": "29e13f6b38f0816af2012e0725507754e8f4569c" }, { "version": "5d424d5a674f782d0659a3b66d951f412901faee", "status": "affected", "versionType": "git", "lessThan": "42726877453afdbe1508a8a96884ea907741d9a7" }, { "version": "5d424d5a674f782d0659a3b66d951f412901faee", "status": "affected", "versionType": "git", "lessThan": "f2845e1504a3bc4f3381394f057e8b63cb5f3f7a" }, { "version": "5d424d5a674f782d0659a3b66d951f412901faee", "status": "affected", "versionType": "git", "lessThan": "602b338e3c3cd7f935f3f5011882961d074e5ac1" }, { "version": "5d424d5a674f782d0659a3b66d951f412901faee", "status": "affected", "versionType": "git", "lessThan": "9ba2b4ac35935f05ac98cff722f36ba07d62270e" }, { "version": "5d424d5a674f782d0659a3b66d951f412901faee", "status": "affected", "versionType": "git", "lessThan": "90385f2b65d0cd2b3b1ac8909f0cc6dd31062cfc" }, { "version": "5d424d5a674f782d0659a3b66d951f412901faee", "status": "affected", "versionType": "git", "lessThan": "aa7f333efd1138a68517a6a6a69ae540dd59d800" }, { "version": "5d424d5a674f782d0659a3b66d951f412901faee", "status": "affected", "versionType": "git", "lessThan": "38ca71a24cd4845021eed35fd2594d89dba9a5a8" }, { "version": "5d424d5a674f782d0659a3b66d951f412901faee", "status": "affected", "versionType": "git", "lessThan": "11825765291a93d8e7f44230da67b9f607c777bf" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.17", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.17" }, { "version": "4.9.318", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.9.*" }, { "version": "4.14.283", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.247", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.198", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.122", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.47", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.17.15", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.17.*" }, { "version": "5.18.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.18.*" }, { "version": "5.19", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }