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CVE-2026-63925

In the Linux kernel, the following vulnerability has been resolved: macsec: fix replay protection at XPN lower-PN wrap In macsec_post_decrypt(), when pn is U32_MAX, pn + 1 overflows u32 to 0 and the first branch never fires. If next_pn_halves.lower is also in the upper half, pn_same_half(pn, lower) is true and the XPN else-if does not fire either, leaving next_pn_halves unchanged. An attacker that captures the legitimate frame carrying pn == 0xFFFFFFFF on an XPN association can then replay it
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:cb733027d23200b9d88ea94f0314cb635dac8bb339ae51f9b270b1512bcb840c
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":"affected","product":"Linux","programFiles":["drivers/net/macsec.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.7"},{"lessThan":"5.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.259","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessThanOr…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7fbe4dcfc6eed2d5e85fee12bc3b0de1d4575098b6619b36405c46da7063ab66 · sha256:dac4cdf3bc4603e3… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/macsec.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"dd7306779c6ce1238f4cdc34f3c1f2246b854457","status":"affected","version":"a21ecf0e033807b976967286e6c392f48ee2049f","versionType":"git"},{"lessThan":"d15130461df388136b62a7b0ce9f66e7e2fa9ff1","status":"affected","version":"a21ecf0e033807b976967286e6c392f48ee2049f","versionType":"git"},{"lessThan":"23c0e230eab397d7f68be2538790ac41d3bb91fd","status":"affected","version":"a21ecf0e033807b976967286e…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7fbe4dcfc6eed2d5e85fee12bc3b0de1d4575098b6619b36405c46da7063ab66 · sha256:dac4cdf3bc4603e3… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/macsec.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.7"},{"lessThan":"5.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.259","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessThanOr…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7fbe4dcfc6eed2d5e85fee12bc3b0de1d4575098b6619b36405c46da7063ab66 · sha256:dac4cdf3bc4603e3… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/macsec.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"dd7306779c6ce1238f4cdc34f3c1f2246b854457","status":"affected","version":"a21ecf0e033807b976967286e6c392f48ee2049f","versionType":"git"},{"lessThan":"d15130461df388136b62a7b0ce9f66e7e2fa9ff1","status":"affected","version":"a21ecf0e033807b976967286e6c392f48ee2049f","versionType":"git"},{"lessThan":"23c0e230eab397d7f68be2538790ac41d3bb91fd","status":"affected","version":"a21ecf0e033807b976967286e…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7fbe4dcfc6eed2d5e85fee12bc3b0de1d4575098b6619b36405c46da7063ab66 · sha256:dac4cdf3bc4603e3… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":8.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7fbe4dcfc6eed2d5e85fee12bc3b0de1d4575098b6619b36405c46da7063ab66 · sha256:dac4cdf3bc4603e3… · /containers/cna/metrics/0/cvssV3_1

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/23c0e230eab397d7f68be2538790ac41d3bb91fd"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7fbe4dcfc6eed2d5e85fee12bc3b0de1d4575098b6619b36405c46da7063ab66 · sha256:dac4cdf3bc4603e3… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/679e13a65e68a67c8b3c0467c02ee89157ec6f0f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7fbe4dcfc6eed2d5e85fee12bc3b0de1d4575098b6619b36405c46da7063ab66 · sha256:dac4cdf3bc4603e3… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/6d00f5c7e5ff7ec4795b7f5f8ed88bd346641652"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7fbe4dcfc6eed2d5e85fee12bc3b0de1d4575098b6619b36405c46da7063ab66 · sha256:dac4cdf3bc4603e3… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/79495a1b0944fe31ffd54b54b00211b493590d62"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7fbe4dcfc6eed2d5e85fee12bc3b0de1d4575098b6619b36405c46da7063ab66 · sha256:dac4cdf3bc4603e3… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/d15130461df388136b62a7b0ce9f66e7e2fa9ff1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7fbe4dcfc6eed2d5e85fee12bc3b0de1d4575098b6619b36405c46da7063ab66 · sha256:dac4cdf3bc4603e3… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/d55acbe577db892b60547b6ef1c020b359331a6d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7fbe4dcfc6eed2d5e85fee12bc3b0de1d4575098b6619b36405c46da7063ab66 · sha256:dac4cdf3bc4603e3… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/dd7306779c6ce1238f4cdc34f3c1f2246b854457"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7fbe4dcfc6eed2d5e85fee12bc3b0de1d4575098b6619b36405c46da7063ab66 · sha256:dac4cdf3bc4603e3… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/e68842b3356471ba56c882209f324613dac47f64"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7fbe4dcfc6eed2d5e85fee12bc3b0de1d4575098b6619b36405c46da7063ab66 · sha256:dac4cdf3bc4603e3… · /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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