{ "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-2026-31424", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31424", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-04-13T13:40:27.957Z", "updatedAt": "2026-10-15T01:16:06.312Z", "importedAt": "2026-10-24T01:58:02.025Z", "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": "netfilter: x_tables: restrict xt_check_match/xt_check_target extensions for NFPROTO_ARP", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: x_tables: restrict xt_check_match/xt_check_target extensions for NFPROTO_ARP\n\nWeiming Shi says:\n\nxt_match and xt_target structs registered with NFPROTO_UNSPEC can be\nloaded by any protocol family through nft_compat. When such a\nmatch/target sets .hooks to restrict which hooks it may run on, the\nbitmask uses NF_INET_* constants. This is only correct for families\nwhose hook layout matches NF_INET_*: IPv4, IPv6, INET, and bridge\nall share the same five hooks (PRE_ROUTING ... POST_ROUTING).\n\nARP only has three hooks (IN=0, OUT=1, FORWARD=2) with different\nsemantics. Because NF_ARP_OUT == 1 == NF_INET_LOCAL_IN, the .hooks\nvalidation silently passes for the wrong reasons, allowing matches to\nrun on ARP chains where the hook assumptions (e.g. state->in being\nset on input hooks) do not hold. This leads to NULL pointer\ndereferences; xt_devgroup is one concrete example:\n\n Oops: general protection fault, probably for non-canonical address 0xdffffc0000000044: 0000 [#1] SMP KASAN NOPTI\n KASAN: null-ptr-deref in range [0x0000000000000220-0x0000000000000227]\n RIP: 0010:devgroup_mt+0xff/0x350\n Call Trace:\n \n nft_match_eval (net/netfilter/nft_compat.c:407)\n nft_do_chain (net/netfilter/nf_tables_core.c:285)\n nft_do_chain_arp (net/netfilter/nft_chain_filter.c:61)\n nf_hook_slow (net/netfilter/core.c:623)\n arp_xmit (net/ipv4/arp.c:666)\n \n Kernel panic - not syncing: Fatal exception in interrupt\n\nFix it by restricting arptables to NFPROTO_ARP extensions only.\nNote that arptables-legacy only supports:\n\n- arpt_CLASSIFY\n- arpt_mangle\n- arpt_MARK\n\nthat provide explicit NFPROTO_ARP match/target declarations.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "9291747f118d6404e509747b85ff5f6dfec368d2", "status": "affected", "versionType": "git", "lessThan": "80e3c75f71c3ea1e62fcb032382de13e00a68f8b" }, { "version": "9291747f118d6404e509747b85ff5f6dfec368d2", "status": "affected", "versionType": "git", "lessThan": "d9a0af9e43416aa50c0595e15fa01365a1c72c49" }, { "version": "9291747f118d6404e509747b85ff5f6dfec368d2", "status": "affected", "versionType": "git", "lessThan": "1cd6313c8644bfebbd813a05da9daa21b09dd68c" }, { "version": "9291747f118d6404e509747b85ff5f6dfec368d2", "status": "affected", "versionType": "git", "lessThan": "f00ac65c90ea475719e08d629e2e26c8b4e6999b" }, { "version": "9291747f118d6404e509747b85ff5f6dfec368d2", "status": "affected", "versionType": "git", "lessThan": "e7e1b6bcb389c8708003d40613a59ff2496f6b1f" }, { "version": "9291747f118d6404e509747b85ff5f6dfec368d2", "status": "affected", "versionType": "git", "lessThan": "dc3e27dd7d76e21106b8f9bbdc31f5da74a89014" }, { "version": "9291747f118d6404e509747b85ff5f6dfec368d2", "status": "affected", "versionType": "git", "lessThan": "3e79374b03bf9a2f282f0eb1d0ac3776f7e0f28a" }, { "version": "9291747f118d6404e509747b85ff5f6dfec368d2", "status": "affected", "versionType": "git", "lessThan": "3d5d488f11776738deab9da336038add95d342d1" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.39", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.39" }, { "version": "5.10.253", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.203", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.168", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.134", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.81", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.22", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "6.19.12", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.19.*" }, { "version": "7.0", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }