310 lines
16 KiB
JSON
310 lines
16 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-43190",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-05-01T14:12:55.992Z",
|
|
"datePublished": "2026-05-06T11:27:59.798Z",
|
|
"dateUpdated": "2026-10-19T19:16:23.381Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T12:26:26.497Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xt_tcpmss: check remaining length before reading optlen\n\nQuoting reporter:\n In net/netfilter/xt_tcpmss.c (lines 53-68), the TCP option parser reads\n op[i+1] directly without validating the remaining option length.\n\n If the last byte of the option field is not EOL/NOP (0/1), the code attempts\n to index op[i+1]. In the case where i + 1 == optlen, this causes an\n out-of-bounds read, accessing memory past the optlen boundary\n (either reading beyond the stack buffer _opt or the\n following payload)."
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
|
|
"baseScore": 8.2,
|
|
"baseSeverity": "HIGH"
|
|
},
|
|
"scenarios": [
|
|
{
|
|
"lang": "en",
|
|
"value": "AV:N - The vulnerable match runs in IPv4/IPv6 netfilter packet-processing hooks, so a remote peer can trigger it by sending a crafted TCP packet to or through a system with a tcpmss iptables/nftables-compatible rule installed.\nAC:L - The trigger is a deterministic TCP option layout where the final option byte is neither EOL nor NOP, causing op[i+1] to be read past the remaining option length. The attacker controls the packet contents and no race or external timing condition is required.\nPR:N - The packet sender does not need credentials or local privileges to reach the rule once it is present on a firewall/router/host. Installing rules requires CAP_NET_ADMIN, including via network namespaces, but that is not required for the remote-trigger scenario.\nUI:N - No victim user action is required; packet processing occurs automatically in the kernel receive/forward/output netfilter path.\nS:U - The impact remains within the kernel/network stack security authority on the affected system. There is no VM escape, IOMMU/DMA boundary crossing, or other scope-changing boundary involved.\nC:L - The bug is a bounded one-byte out-of-bounds read beyond the TCP options buffer, potentially into adjacent stack or skb data. Because it is only a single byte and is not a broad arbitrary read primitive, confidentiality impact is Low rather than High.\nI:N - The vulnerable operation only reads op[i+1] and uses it to advance the parser; it does not write to kernel memory or packet data. I found no control-flow or data-integrity primitive from this one-byte read.\nA:H - Malformed packets can repeatedly trigger the out-of-bounds read in softirq/netfilter packet processing. On instrumented or hardened kernels this can produce a KASAN/oops/panic, so availability impact is High under highest-defensible scoring."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"net/netfilter/xt_tcpmss.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
|
|
"lessThan": "f895191dc32c53eaf443b6443fe40945b2f92287",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
|
|
"lessThan": "cd5beda7e0e32865e214f28034bb92c1cecff885",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
|
|
"lessThan": "eaedc0bc18be46fe7f58170e967959a932c4f824",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
|
|
"lessThan": "07a9b32eaae792ff7d0fcac14d8920c937c0a9c3",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
|
|
"lessThan": "8b300f726640c48c3edfe9c453334dd801f4b74e",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
|
|
"lessThan": "5e13d0a37666955b6cfddc0f73cb40ed645b8a05",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
|
|
"lessThan": "f6c412dcfd76b0516d51aa847d8f4c7b70381b09",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
|
|
"lessThan": "735ee8582da3d239eb0c7a53adca61b79fb228b3",
|
|
"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/xt_tcpmss.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "2.6.12",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "2.6.12",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.10.252",
|
|
"lessThanOrEqual": "5.10.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.15.202",
|
|
"lessThanOrEqual": "5.15.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.1.165",
|
|
"lessThanOrEqual": "6.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.6.128",
|
|
"lessThanOrEqual": "6.6.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.75",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.16",
|
|
"lessThanOrEqual": "6.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.19.6",
|
|
"lessThanOrEqual": "6.19.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.0",
|
|
"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": "2.6.12",
|
|
"versionEndExcluding": "5.10.252"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "2.6.12",
|
|
"versionEndExcluding": "5.15.202"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "2.6.12",
|
|
"versionEndExcluding": "6.1.165"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "2.6.12",
|
|
"versionEndExcluding": "6.6.128"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "2.6.12",
|
|
"versionEndExcluding": "6.12.75"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "2.6.12",
|
|
"versionEndExcluding": "6.18.16"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "2.6.12",
|
|
"versionEndExcluding": "6.19.6"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "2.6.12",
|
|
"versionEndExcluding": "7.0"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/f895191dc32c53eaf443b6443fe40945b2f92287"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/cd5beda7e0e32865e214f28034bb92c1cecff885"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/eaedc0bc18be46fe7f58170e967959a932c4f824"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/07a9b32eaae792ff7d0fcac14d8920c937c0a9c3"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/8b300f726640c48c3edfe9c453334dd801f4b74e"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/5e13d0a37666955b6cfddc0f73cb40ed645b8a05"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/f6c412dcfd76b0516d51aa847d8f4c7b70381b09"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/735ee8582da3d239eb0c7a53adca61b79fb228b3"
|
|
}
|
|
],
|
|
"title": "netfilter: xt_tcpmss: check remaining length before reading optlen",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2026-43190",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "yes"
|
|
},
|
|
{
|
|
"Technical Impact": "partial"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2026-10-16T15:15:30.447142Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"type": "CWE",
|
|
"cweId": "CWE-125",
|
|
"description": "CWE-125 Out-of-bounds Read"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-10-19T19:16:23.381Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |