{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64047", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.029Z", "datePublished": "2026-07-19T15:39:31.960Z", "dateUpdated": "2026-07-19T15:39:31.960Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T15:39:31.960Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tls: fix off-by-one in sg_chain entry count for wrapped sk_msg ring\n\nWhen an sk_msg scatterlist ring wraps (sg.end < sg.start),\ntls_push_record() chains the tail portion of the ring to the head\nusing sg_chain(). An extra entry in the sg array is reserved for\nthis:\n\n struct sk_msg_sg {\n [...]\n /* The extra two elements:\n * 1) used for chaining the front and sections when the list becomes\n * partitioned (e.g. end < start). The crypto APIs require the\n * chaining;\n * 2) to chain tailer SG entries after the message.\n */\n struct scatterlist data[MAX_MSG_FRAGS + 2];\n\nThe current code uses MAX_SKB_FRAGS + 1 as the ring size:\n\n sg_chain(&msg_pl->sg.data[msg_pl->sg.start],\n MAX_SKB_FRAGS - msg_pl->sg.start + 1,\n msg_pl->sg.data);\n\nThis places the chain pointer at\n\n sg_chain(data[start], (MAX_SKB_FRAGS - msg_start + 1) .. =\n &data[start] + (MAX_SKB_FRAGS - msg_start + 1) - 1 =\n data[start + (MAX_SKB_FRAGS - start + 1) - 1] =\n data[MAX_SKB_FRAGS]\n\ninstead of the true last entry. This is likely due to a \"race\" of\nthe commit under Fixes landing close to\ncommit 031097d9e079 (\"bpf: sk_msg, zap ingress queue on psock down\")\n\nConvert to ARRAY_SIZE and drop the data[start] / - start (as suggested\nby Sabrina)."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/tls/tls_sw.c"], "versions": [{"version": "9aaaa56845a06aeabdd597cbe19492dc01f281ec", "lessThan": "73963a375885d5ccb7def39fd0b4f542e0f343dd", "status": "affected", "versionType": "git"}, {"version": "9aaaa56845a06aeabdd597cbe19492dc01f281ec", "lessThan": "47110c3a9ac247b688657337f5981efcfcb240dc", "status": "affected", "versionType": "git"}, {"version": "9aaaa56845a06aeabdd597cbe19492dc01f281ec", "lessThan": "84158c2997159df4a0d70cd9c46774512d32a522", "status": "affected", "versionType": "git"}, {"version": "9aaaa56845a06aeabdd597cbe19492dc01f281ec", "lessThan": "131ef12057d92b77b636321b7849c69222405a97", "status": "affected", "versionType": "git"}, {"version": "9aaaa56845a06aeabdd597cbe19492dc01f281ec", "lessThan": "66339b71f105e6f83e0da3b9583d95077534fe1d", "status": "affected", "versionType": "git"}, {"version": "9aaaa56845a06aeabdd597cbe19492dc01f281ec", "lessThan": "eca989eab4b2599dcb02f72140a7c08f08838520", "status": "affected", "versionType": "git"}, {"version": "9aaaa56845a06aeabdd597cbe19492dc01f281ec", "lessThan": "2fb0dc7e0099686c4e9d2732745d8a31b18c3628", "status": "affected", "versionType": "git"}, {"version": "9aaaa56845a06aeabdd597cbe19492dc01f281ec", "lessThan": "285943c6e7ca309bbea84b253745154241d9788a", "status": "affected", "versionType": "git"}, {"version": "d529d6c9f7e3aaeac13c4948f79799ccb825f29d", "status": "affected", "versionType": "git"}, {"version": "5.4.14", "lessThan": "5.5", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/tls/tls_sw.c"], "versions": [{"version": "5.5", "status": "affected"}, {"version": "0", "lessThan": "5.5", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "5.5", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.6.142"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.14"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/73963a375885d5ccb7def39fd0b4f542e0f343dd"}, {"url": "https://git.kernel.org/stable/c/47110c3a9ac247b688657337f5981efcfcb240dc"}, {"url": "https://git.kernel.org/stable/c/84158c2997159df4a0d70cd9c46774512d32a522"}, {"url": "https://git.kernel.org/stable/c/131ef12057d92b77b636321b7849c69222405a97"}, {"url": "https://git.kernel.org/stable/c/66339b71f105e6f83e0da3b9583d95077534fe1d"}, {"url": "https://git.kernel.org/stable/c/eca989eab4b2599dcb02f72140a7c08f08838520"}, {"url": "https://git.kernel.org/stable/c/2fb0dc7e0099686c4e9d2732745d8a31b18c3628"}, {"url": "https://git.kernel.org/stable/c/285943c6e7ca309bbea84b253745154241d9788a"}], "title": "net: tls: fix off-by-one in sg_chain entry count for wrapped sk_msg ring", "x_generator": {"engine": "bippy-1.2.0"}}}}

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