{"dataType":"CVE_RECORD","cveMetadata":{"cveId":"CVE-2024-26851","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-19T14:20:24.183Z","datePublished":"2024-04-17T10:17:15.298Z","dateUpdated":"2026-05-12T11:49:32.649Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T20:05:21.167Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_h323: Add protection for bmp length out of range\n\nUBSAN load reports an exception of BRK#5515 SHIFT_ISSUE:Bitwise shifts\nthat are out of bounds for their data type.\n\nvmlinux   get_bitmap(b=75) + 712\n<net/netfilter/nf_conntrack_h323_asn1.c:0>\nvmlinux   decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, level=134443100) + 1956\n<net/netfilter/nf_conntrack_h323_asn1.c:592>\nvmlinux   decode_choice(base=0xFFFFFFD0080370F0, level=23843636) + 1216\n<net/netfilter/nf_conntrack_h323_asn1.c:814>\nvmlinux   decode_seq(f=0xFFFFFFD0080371A8, level=134443500) + 812\n<net/netfilter/nf_conntrack_h323_asn1.c:576>\nvmlinux   decode_choice(base=0xFFFFFFD008037280, level=0) + 1216\n<net/netfilter/nf_conntrack_h323_asn1.c:814>\nvmlinux   DecodeRasMessage() + 304\n<net/netfilter/nf_conntrack_h323_asn1.c:833>\nvmlinux   ras_help() + 684\n<net/netfilter/nf_conntrack_h323_main.c:1728>\nvmlinux   nf_confirm() + 188\n<net/netfilter/nf_conntrack_proto.c:137>\n\nDue to abnormal data in skb->data, the extension bitmap length\nexceeds 32 when decoding ras message then uses the length to make\na shift operation. It will change into negative after several loop.\nUBSAN load could detect a negative shift as an undefined behaviour\nand reports exception.\nSo we add the protection to avoid the length exceeding 32. Or else\nit will return out of range error and stop decoding."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_conntrack_h323_asn1.c"],"versions":[{"version":"5e35941d990123f155b02d5663e51a24f816b6f3","lessThan":"98db42191329c679f4ca52bec0b319689e1ad8cb","status":"affected","versionType":"git"},{"version":"5e35941d990123f155b02d5663e51a24f816b6f3","lessThan":"4bafcc43baf7bcf93566394dbd15726b5b456b7a","status":"affected","versionType":"git"},{"version":"5e35941d990123f155b02d5663e51a24f816b6f3","lessThan":"ccd1108b16ab572d9bf635586b0925635dbd6bbc","status":"affected","versionType":"git"},{"version":"5e35941d990123f155b02d5663e51a24f816b6f3","lessThan":"b3c0f553820516ad4b62a9390ecd28d6f73a7b13","status":"affected","versionType":"git"},{"version":"5e35941d990123f155b02d5663e51a24f816b6f3","lessThan":"39001e3c42000e7c2038717af0d33c32319ad591","status":"affected","versionType":"git"},{"version":"5e35941d990123f155b02d5663e51a24f816b6f3","lessThan":"014a807f1cc9c9d5173c1cd935835553b00d211c","status":"affected","versionType":"git"},{"version":"5e35941d990123f155b02d5663e51a24f816b6f3","lessThan":"80ee5054435a11c87c9a4f30f1ff750080c96416","status":"affected","versionType":"git"},{"version":"5e35941d990123f155b02d5663e51a24f816b6f3","lessThan":"767146637efc528b5e3d31297df115e85a2fd362","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_conntrack_h323_asn1.c"],"versions":[{"version":"2.6.17","status":"affected"},{"version":"0","lessThan":"2.6.17","status":"unaffected","versionType":"semver"},{"version":"4.19.310","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.272","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.213","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.152","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.82","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.22","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.7.10","lessThanOrEqual":"6.7.*","status":"unaffected","versionType":"semver"},{"version":"6.8","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.17","versionEndExcluding":"4.19.310"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.17","versionEndExcluding":"5.4.272"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.17","versionEndExcluding":"5.10.213"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.17","versionEndExcluding":"5.15.152"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.17","versionEndExcluding":"6.1.82"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.17","versionEndExcluding":"6.6.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.17","versionEndExcluding":"6.7.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.17","versionEndExcluding":"6.8"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/98db42191329c679f4ca52bec0b319689e1ad8cb"},{"url":"https://git.kernel.org/stable/c/4bafcc43baf7bcf93566394dbd15726b5b456b7a"},{"url":"https://git.kernel.org/stable/c/ccd1108b16ab572d9bf635586b0925635dbd6bbc"},{"url":"https://git.kernel.org/stable/c/b3c0f553820516ad4b62a9390ecd28d6f73a7b13"},{"url":"https://git.kernel.org/stable/c/39001e3c42000e7c2038717af0d33c32319ad591"},{"url":"https://git.kernel.org/stable/c/014a807f1cc9c9d5173c1cd935835553b00d211c"},{"url":"https://git.kernel.org/stable/c/80ee5054435a11c87c9a4f30f1ff750080c96416"},{"url":"https://git.kernel.org/stable/c/767146637efc528b5e3d31297df115e85a2fd362"}],"title":"netfilter: 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