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CVE-2026-31685

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6t_eui64: reject invalid MAC header for all packets `eui64_mt6()` derives a modified EUI-64 from the Ethernet source address and compares it with the low 64 bits of the IPv6 source address. The existing guard only rejects an invalid MAC header when `par->fragoff != 0`. For packets with `par->fragoff == 0`, `eui64_mt6()` can still reach `eth_hdr(skb)` even when the MAC header is not valid. Fix this by removing th
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:05df93c511e484bcbf38ad7696d6617195a0fe1800f56c80c85eaccc3fd6005f
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/ipv6/netfilter/ip6t_eui64.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4d75bc2cd093bf5803edf512c099bfb220fd6459","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"7d6a57411caf54df025860c9b1a82cd42d57a562","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"d5603591373441fecf9951833d6d873e09320f08","status":"affected","version":"1da177e4c3f415…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5a8440f866bced821cdf13d1da8a4570824f4a9850a0257c71eff5776bd313c3 · sha256:0639a3c8b9cca25e… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/netfilter/ip6t_eui64.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":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semv…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5a8440f866bced821cdf13d1da8a4570824f4a9850a0257c71eff5776bd313c3 · sha256:0639a3c8b9cca25e… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv6/netfilter/ip6t_eui64.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4d75bc2cd093bf5803edf512c099bfb220fd6459","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"7d6a57411caf54df025860c9b1a82cd42d57a562","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"d5603591373441fecf9951833d6d873e09320f08","status":"affected","version":"1da177e4c3f415…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5a8440f866bced821cdf13d1da8a4570824f4a9850a0257c71eff5776bd313c3 · sha256:0639a3c8b9cca25e… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/netfilter/ip6t_eui64.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":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semv…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5a8440f866bced821cdf13d1da8a4570824f4a9850a0257c71eff5776bd313c3 · sha256:0639a3c8b9cca25e… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":9.4,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:5a8440f866bced821cdf13d1da8a4570824f4a9850a0257c71eff5776bd313c3 · sha256:0639a3c8b9cca25e… · /containers/cna/metrics/0/cvssV3_1

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/288138418bef956f8b295751a4536c60f0e89f4a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5a8440f866bced821cdf13d1da8a4570824f4a9850a0257c71eff5776bd313c3 · sha256:0639a3c8b9cca25e… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/309ae3e9a51a69699ca94eac5fac5688fa562d55"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5a8440f866bced821cdf13d1da8a4570824f4a9850a0257c71eff5776bd313c3 · sha256:0639a3c8b9cca25e… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/4d75bc2cd093bf5803edf512c099bfb220fd6459"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5a8440f866bced821cdf13d1da8a4570824f4a9850a0257c71eff5776bd313c3 · sha256:0639a3c8b9cca25e… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/7d6a57411caf54df025860c9b1a82cd42d57a562"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5a8440f866bced821cdf13d1da8a4570824f4a9850a0257c71eff5776bd313c3 · sha256:0639a3c8b9cca25e… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/807d6ee15804df6f01a35c910f09612e858739a6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5a8440f866bced821cdf13d1da8a4570824f4a9850a0257c71eff5776bd313c3 · sha256:0639a3c8b9cca25e… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/9eda5478746ef7dc0e4e537b5a5e4b0ca1027091"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5a8440f866bced821cdf13d1da8a4570824f4a9850a0257c71eff5776bd313c3 · sha256:0639a3c8b9cca25e… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/d5603591373441fecf9951833d6d873e09320f08"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5a8440f866bced821cdf13d1da8a4570824f4a9850a0257c71eff5776bd313c3 · sha256:0639a3c8b9cca25e… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/fdce0b3590f724540795b874b4c8850c90e6b0a8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5a8440f866bced821cdf13d1da8a4570824f4a9850a0257c71eff5776bd313c3 · sha256:0639a3c8b9cca25e… · /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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