{ "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-2024-26633", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-26633", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-03-18T10:07:49.468Z", "updatedAt": "2026-05-23T15:36:13.795Z", "importedAt": "2026-10-24T01:57:07.518Z", "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": "ip6_tunnel: fix NEXTHDR_FRAGMENT handling in ip6_tnl_parse_tlv_enc_lim()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nip6_tunnel: fix NEXTHDR_FRAGMENT handling in ip6_tnl_parse_tlv_enc_lim()\n\nsyzbot pointed out [1] that NEXTHDR_FRAGMENT handling is broken.\n\nReading frag_off can only be done if we pulled enough bytes\nto skb->head. Currently we might access garbage.\n\n[1]\nBUG: KMSAN: uninit-value in ip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0\nip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0\nipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline]\nip6_tnl_start_xmit+0xab2/0x1a70 net/ipv6/ip6_tunnel.c:1432\n__netdev_start_xmit include/linux/netdevice.h:4940 [inline]\nnetdev_start_xmit include/linux/netdevice.h:4954 [inline]\nxmit_one net/core/dev.c:3548 [inline]\ndev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564\n__dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349\ndev_queue_xmit include/linux/netdevice.h:3134 [inline]\nneigh_connected_output+0x569/0x660 net/core/neighbour.c:1592\nneigh_output include/net/neighbour.h:542 [inline]\nip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137\nip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222\nNF_HOOK_COND include/linux/netfilter.h:303 [inline]\nip6_output+0x323/0x610 net/ipv6/ip6_output.c:243\ndst_output include/net/dst.h:451 [inline]\nip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155\nip6_send_skb net/ipv6/ip6_output.c:1952 [inline]\nip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972\nrawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582\nrawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:920\ninet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:847\nsock_sendmsg_nosec net/socket.c:730 [inline]\n__sock_sendmsg net/socket.c:745 [inline]\n____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584\n___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638\n__sys_sendmsg net/socket.c:2667 [inline]\n__do_sys_sendmsg net/socket.c:2676 [inline]\n__se_sys_sendmsg net/socket.c:2674 [inline]\n__x64_sys_sendmsg+0x307/0x490 net/socket.c:2674\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\ndo_syscall_64+0x44/0x110 arch/x86/entry/common.c:83\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nUninit was created at:\nslab_post_alloc_hook+0x129/0xa70 mm/slab.h:768\nslab_alloc_node mm/slub.c:3478 [inline]\n__kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517\n__do_kmalloc_node mm/slab_common.c:1006 [inline]\n__kmalloc_node_track_caller+0x118/0x3c0 mm/slab_common.c:1027\nkmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:582\npskb_expand_head+0x226/0x1a00 net/core/skbuff.c:2098\n__pskb_pull_tail+0x13b/0x2310 net/core/skbuff.c:2655\npskb_may_pull_reason include/linux/skbuff.h:2673 [inline]\npskb_may_pull include/linux/skbuff.h:2681 [inline]\nip6_tnl_parse_tlv_enc_lim+0x901/0xbb0 net/ipv6/ip6_tunnel.c:408\nipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline]\nip6_tnl_start_xmit+0xab2/0x1a70 net/ipv6/ip6_tunnel.c:1432\n__netdev_start_xmit include/linux/netdevice.h:4940 [inline]\nnetdev_start_xmit include/linux/netdevice.h:4954 [inline]\nxmit_one net/core/dev.c:3548 [inline]\ndev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564\n__dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349\ndev_queue_xmit include/linux/netdevice.h:3134 [inline]\nneigh_connected_output+0x569/0x660 net/core/neighbour.c:1592\nneigh_output include/net/neighbour.h:542 [inline]\nip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137\nip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222\nNF_HOOK_COND include/linux/netfilter.h:303 [inline]\nip6_output+0x323/0x610 net/ipv6/ip6_output.c:243\ndst_output include/net/dst.h:451 [inline]\nip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155\nip6_send_skb net/ipv6/ip6_output.c:1952 [inline]\nip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972\nrawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582\nrawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:920\ninet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:847\nsock_sendmsg_nosec net/socket.c:730 [inline]\n__sock_sendmsg net/socket.c:745 [inline]\n____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584\n___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638\n__sys_sendmsg net/socket.c:2667 [inline]\n__do_sys_sendms\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "fbfa743a9d2a0ffa24251764f10afc13eb21e739", "status": "affected", "versionType": "git", "lessThan": "135414f300c5db995e2a2f3bf0f455de9d014aee" }, { "version": "fbfa743a9d2a0ffa24251764f10afc13eb21e739", "status": "affected", "versionType": "git", "lessThan": "3f15ba3dc14e6ee002ea01b4faddc3d49200377c" }, { "version": "fbfa743a9d2a0ffa24251764f10afc13eb21e739", "status": "affected", "versionType": "git", "lessThan": "da23bd709b46168f7dfc36055801011222b076cd" }, { "version": "fbfa743a9d2a0ffa24251764f10afc13eb21e739", "status": "affected", "versionType": "git", "lessThan": "4329426cf6b8e22b798db2331c7ef1dd2a9c748d" }, { "version": "fbfa743a9d2a0ffa24251764f10afc13eb21e739", "status": "affected", "versionType": "git", "lessThan": "62a1fedeb14c7ac0947ef33fadbabd35ed2400a2" }, { "version": "fbfa743a9d2a0ffa24251764f10afc13eb21e739", "status": "affected", "versionType": "git", "lessThan": "687c5d52fe53e602e76826dbd4d7af412747e183" }, { "version": "fbfa743a9d2a0ffa24251764f10afc13eb21e739", "status": "affected", "versionType": "git", "lessThan": "ba8d904c274268b18ef3dc11d3ca7b24a96cb087" }, { "version": "fbfa743a9d2a0ffa24251764f10afc13eb21e739", "status": "affected", "versionType": "git", "lessThan": "d375b98e0248980681e5e56b712026174d617198" }, { "version": "a6f6bb6bc04a5f88a31f47a6123d3fbf5ee8d694", "status": "affected", "versionType": "git" }, { "version": "72bbf335e7aad09c88c50dbdd238f4faabd12174", "status": "affected", "versionType": "git" }, { "version": "decccc92ee0a978a1c268b5df16824cb6384ed3c", "status": "affected", "versionType": "git" }, { "version": "d3d9b59ab32160e3cc4edcf7e5fa7cecb53a7d25", "status": "affected", "versionType": "git" }, { "version": "d397f7035d2c754781bbe93b07b94d8cd898620c", "status": "affected", "versionType": "git" }, { "version": "41e07a7e01d951cfd4c9a7dac90c921269d89513", "status": "affected", "versionType": "git" }, { "version": "a7fe4e5d06338e1a82b1977eca37400951f99730", "status": "affected", "versionType": "git" }, { "version": "3.2.87", "status": "affected", "versionType": "semver", "lessThan": "3.3" }, { "version": "3.10.106", "status": "affected", "versionType": "semver", "lessThan": "3.11" }, { "version": "3.12.71", "status": "affected", "versionType": "semver", "lessThan": "3.13" }, { "version": "3.16.42", "status": "affected", "versionType": "semver", "lessThan": "3.17" }, { "version": "3.18.49", "status": "affected", "versionType": "semver", "lessThan": "3.19" }, { "version": "4.4.50", "status": "affected", "versionType": "semver", "lessThan": "4.5" }, { "version": "4.9.11", "status": "affected", "versionType": "semver", "lessThan": "4.10" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.10", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.10" }, { "version": "4.19.306", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.268", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.209", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.148", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.75", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.14", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.7.2", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.7.*" }, { "version": "6.8", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }