CVE Explorer

CVE-2026-43190

In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_tcpmss: check remaining length before reading optlen Quoting reporter: In net/netfilter/xt_tcpmss.c (lines 53-68), the TCP option parser reads op[i+1] directly without validating the remaining option length. If the last byte of the option field is not EOL/NOP (0/1), the code attempts to index op[i+1]. In the case where i + 1 == optlen, this causes an out-of-bounds read, accessing memory past the optlen

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:25e06f1e07013189b3e5f25cde305f29ef905d2a8e2d21e03753e1a74d57bdce

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/xt_tcpmss.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f895191dc32c53eaf443b6443fe40945b2f92287","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"cd5beda7e0e32865e214f28034bb92c1cecff885","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"eaedc0bc18be46fe7f58170e967959a932c4f824","status":"affected","version":"1da177e4c3f41524e886…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:c79c14ba70ce54f3a6a1b7a904186c3f7ec1f8dc05e5514338070a0232bf082d · sha256:990dfaf0ba729d83… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/xt_tcpmss.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.12"},{"lessThan":"2.6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.252","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.202","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.165","versionType":"semver"},{…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:c79c14ba70ce54f3a6a1b7a904186c3f7ec1f8dc05e5514338070a0232bf082d · sha256:990dfaf0ba729d83… · /containers/cna/affected/1

Affected products and versions

2 source assertions

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:c79c14ba70ce54f3a6a1b7a904186c3f7ec1f8dc05e5514338070a0232bf082d · sha256:990dfaf0ba729d83… · /containers/cna/affected/0

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:c79c14ba70ce54f3a6a1b7a904186c3f7ec1f8dc05e5514338070a0232bf082d · sha256:990dfaf0ba729d83… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":8.2,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:c79c14ba70ce54f3a6a1b7a904186c3f7ec1f8dc05e5514338070a0232bf082d · sha256:990dfaf0ba729d83… · /containers/cna/metrics/0/cvssV3_1

Source references

8 source assertions

{"url":"https://git.kernel.org/stable/c/07a9b32eaae792ff7d0fcac14d8920c937c0a9c3"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c79c14ba70ce54f3a6a1b7a904186c3f7ec1f8dc05e5514338070a0232bf082d · sha256:990dfaf0ba729d83… · /containers/cna/references/3

{"url":"https://git.kernel.org/stable/c/5e13d0a37666955b6cfddc0f73cb40ed645b8a05"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c79c14ba70ce54f3a6a1b7a904186c3f7ec1f8dc05e5514338070a0232bf082d · sha256:990dfaf0ba729d83… · /containers/cna/references/5

{"url":"https://git.kernel.org/stable/c/735ee8582da3d239eb0c7a53adca61b79fb228b3"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c79c14ba70ce54f3a6a1b7a904186c3f7ec1f8dc05e5514338070a0232bf082d · sha256:990dfaf0ba729d83… · /containers/cna/references/7

{"url":"https://git.kernel.org/stable/c/8b300f726640c48c3edfe9c453334dd801f4b74e"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c79c14ba70ce54f3a6a1b7a904186c3f7ec1f8dc05e5514338070a0232bf082d · sha256:990dfaf0ba729d83… · /containers/cna/references/4

{"url":"https://git.kernel.org/stable/c/cd5beda7e0e32865e214f28034bb92c1cecff885"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c79c14ba70ce54f3a6a1b7a904186c3f7ec1f8dc05e5514338070a0232bf082d · sha256:990dfaf0ba729d83… · /containers/cna/references/1

{"url":"https://git.kernel.org/stable/c/eaedc0bc18be46fe7f58170e967959a932c4f824"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c79c14ba70ce54f3a6a1b7a904186c3f7ec1f8dc05e5514338070a0232bf082d · sha256:990dfaf0ba729d83… · /containers/cna/references/2

{"url":"https://git.kernel.org/stable/c/f6c412dcfd76b0516d51aa847d8f4c7b70381b09"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c79c14ba70ce54f3a6a1b7a904186c3f7ec1f8dc05e5514338070a0232bf082d · sha256:990dfaf0ba729d83… · /containers/cna/references/6

{"url":"https://git.kernel.org/stable/c/f895191dc32c53eaf443b6443fe40945b2f92287"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c79c14ba70ce54f3a6a1b7a904186c3f7ec1f8dc05e5514338070a0232bf082d · sha256:990dfaf0ba729d83… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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