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CVE-2026-31681

In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_multiport: validate range encoding in checkentry ports_match_v1() treats any non-zero pflags entry as the start of a port range and unconditionally consumes the next ports[] element as the range end. The checkentry path currently validates protocol, flags and count, but it does not validate the range encoding itself. As a result, malformed rules can mark the last slot as a range start or place two range starts b
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2f6f7a91a434297d5f2514c1cb7928d89e29e2ec57a35003c3c316396770952f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/xt_multiport.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8c5bf8f5b478f569191c4a7982de7cd5f5f73c1a","status":"affected","version":"a89ecb6a2ef732d04058d87801e2b6bd7e5c7089","versionType":"git"},{"lessThan":"c9749f6232c845e31c21d4cc72200211df15d8a2","status":"affected","version":"a89ecb6a2ef732d04058d87801e2b6bd7e5c7089","versionType":"git"},{"lessThan":"b67d638cbee9975c765feb45c126e96ed11ec802","status":"affected","version":"a89ecb6a2ef732d04…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:12d98b6bc9672ba82c8337f2ec491dc5d354394254e4a08bb8e7fabb6cc362ae · sha256:b924c9fcf44a083b… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/xt_multiport.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.17"},{"lessThan":"2.6.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:12d98b6bc9672ba82c8337f2ec491dc5d354394254e4a08bb8e7fabb6cc362ae · sha256:b924c9fcf44a083b… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/xt_multiport.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8c5bf8f5b478f569191c4a7982de7cd5f5f73c1a","status":"affected","version":"a89ecb6a2ef732d04058d87801e2b6bd7e5c7089","versionType":"git"},{"lessThan":"c9749f6232c845e31c21d4cc72200211df15d8a2","status":"affected","version":"a89ecb6a2ef732d04058d87801e2b6bd7e5c7089","versionType":"git"},{"lessThan":"b67d638cbee9975c765feb45c126e96ed11ec802","status":"affected","version":"a89ecb6a2ef732d04…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:12d98b6bc9672ba82c8337f2ec491dc5d354394254e4a08bb8e7fabb6cc362ae · sha256:b924c9fcf44a083b… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/xt_multiport.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.17"},{"lessThan":"2.6.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:12d98b6bc9672ba82c8337f2ec491dc5d354394254e4a08bb8e7fabb6cc362ae · sha256:b924c9fcf44a083b… · /containers/cna/affected/1

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/1e4baa853f1cc4227e04f52d6860524707cfb294"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:12d98b6bc9672ba82c8337f2ec491dc5d354394254e4a08bb8e7fabb6cc362ae · sha256:b924c9fcf44a083b… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/36bf0d98e180a7c384c8d8a59b0d2d4b80e5eb16"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:12d98b6bc9672ba82c8337f2ec491dc5d354394254e4a08bb8e7fabb6cc362ae · sha256:b924c9fcf44a083b… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/8368ce8eb01f0b91111d814703696e780d0ef12f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:12d98b6bc9672ba82c8337f2ec491dc5d354394254e4a08bb8e7fabb6cc362ae · sha256:b924c9fcf44a083b… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/8c5bf8f5b478f569191c4a7982de7cd5f5f73c1a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:12d98b6bc9672ba82c8337f2ec491dc5d354394254e4a08bb8e7fabb6cc362ae · sha256:b924c9fcf44a083b… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/aec14808271f2bf2b656de6ff12dfe73c5fd3b67"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:12d98b6bc9672ba82c8337f2ec491dc5d354394254e4a08bb8e7fabb6cc362ae · sha256:b924c9fcf44a083b… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/b67d638cbee9975c765feb45c126e96ed11ec802"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:12d98b6bc9672ba82c8337f2ec491dc5d354394254e4a08bb8e7fabb6cc362ae · sha256:b924c9fcf44a083b… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/c9749f6232c845e31c21d4cc72200211df15d8a2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:12d98b6bc9672ba82c8337f2ec491dc5d354394254e4a08bb8e7fabb6cc362ae · sha256:b924c9fcf44a083b… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/ff64c5bfef12461df8450e0f50bb693b5269c720"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:12d98b6bc9672ba82c8337f2ec491dc5d354394254e4a08bb8e7fabb6cc362ae · sha256:b924c9fcf44a083b… · /containers/cna/references/7

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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