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CVE-2026-64554

In the Linux kernel, the following vulnerability has been resolved: netfilter: bridge: fix stale prevhdr pointer in br_ip6_fragment() br_ip6_fragment() gets prevhdr, a pointer into the skb head, from ip6_find_1stfragopt(), then calls skb_checksum_help(). For a cloned skb skb_checksum_help() reallocates the head via pskb_expand_head(), leaving prevhdr dangling. It is later dereferenced in ip6_frag_next(), causing a use-after-free write. Save prevhdr's offset before skb_checksum_help() and re
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d89f96a20cddb9c09ba918634b4c9485f794961ae44a40d905b31775bcf200ea
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.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8c10778ec674b67a07ea042fcba64270f3f38a5a","status":"affected","version":"764dd163ac922f8683b5bcd3007251ce7b26cd33","versionType":"git"},{"lessThan":"2731efa6364e47934c96eb69e01ea131e8af8030","status":"affected","version":"764dd163ac922f8683b5bcd3007251ce7b26cd33","versionType":"git"},{"lessThan":"00c06ef8c018493943891a7d0ca82b71b24f3180","status":"affected","version":"764dd163ac922f8683b5bcd30…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ffa77c21e7ed549f95be02a9c57000cf6c43e544f598909100216879c8bfaf2b · sha256:b84ec9c0ce5a3040… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/netfilter.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.3"},{"lessThan":"5.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOr…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ffa77c21e7ed549f95be02a9c57000cf6c43e544f598909100216879c8bfaf2b · sha256:b84ec9c0ce5a3040… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv6/netfilter.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8c10778ec674b67a07ea042fcba64270f3f38a5a","status":"affected","version":"764dd163ac922f8683b5bcd3007251ce7b26cd33","versionType":"git"},{"lessThan":"2731efa6364e47934c96eb69e01ea131e8af8030","status":"affected","version":"764dd163ac922f8683b5bcd3007251ce7b26cd33","versionType":"git"},{"lessThan":"00c06ef8c018493943891a7d0ca82b71b24f3180","status":"affected","version":"764dd163ac922f8683b5bcd30…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ffa77c21e7ed549f95be02a9c57000cf6c43e544f598909100216879c8bfaf2b · sha256:b84ec9c0ce5a3040… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/netfilter.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.3"},{"lessThan":"5.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOr…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ffa77c21e7ed549f95be02a9c57000cf6c43e544f598909100216879c8bfaf2b · sha256:b84ec9c0ce5a3040… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ffa77c21e7ed549f95be02a9c57000cf6c43e544f598909100216879c8bfaf2b · sha256:b84ec9c0ce5a3040… · /containers/cna/metrics/0/cvssV3_1

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/00c06ef8c018493943891a7d0ca82b71b24f3180"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ffa77c21e7ed549f95be02a9c57000cf6c43e544f598909100216879c8bfaf2b · sha256:b84ec9c0ce5a3040… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/1c4f67c89fd27c4df4c70b135c2c59627698b3c0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ffa77c21e7ed549f95be02a9c57000cf6c43e544f598909100216879c8bfaf2b · sha256:b84ec9c0ce5a3040… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/2731efa6364e47934c96eb69e01ea131e8af8030"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ffa77c21e7ed549f95be02a9c57000cf6c43e544f598909100216879c8bfaf2b · sha256:b84ec9c0ce5a3040… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/4ac981a8b7ce7aec99a52d08f8a8953e8e120067"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ffa77c21e7ed549f95be02a9c57000cf6c43e544f598909100216879c8bfaf2b · sha256:b84ec9c0ce5a3040… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/86f3ce81dd2b4b0aa2c3016c989a943e4b1b643d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ffa77c21e7ed549f95be02a9c57000cf6c43e544f598909100216879c8bfaf2b · sha256:b84ec9c0ce5a3040… · /containers/cna/references/7
{"url":"https://git.kernel.org/stable/c/8c10778ec674b67a07ea042fcba64270f3f38a5a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ffa77c21e7ed549f95be02a9c57000cf6c43e544f598909100216879c8bfaf2b · sha256:b84ec9c0ce5a3040… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/c141f69d0a0fb16964dbc293650047e69bda8af7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ffa77c21e7ed549f95be02a9c57000cf6c43e544f598909100216879c8bfaf2b · sha256:b84ec9c0ce5a3040… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/f2e6596d10783557aeb9668da2a3b4d19deb2001"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ffa77c21e7ed549f95be02a9c57000cf6c43e544f598909100216879c8bfaf2b · sha256:b84ec9c0ce5a3040… · /containers/cna/references/4

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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