CVE Explorer

CVE-2026-63920

In the Linux kernel, the following vulnerability has been resolved: ipv6: validate extension header length before copying to cmsg ip6_datagram_recv_specific_ctl() builds IPV6_{HOPOPTS,DSTOPTS,RTHDR} cmsgs (and their IPV6_2292* legacy counterparts) by trusting the on-wire hdrlen byte (ptr[1]) when computing the put_cmsg() length. The length was validated only at parse time (ipv6_parse_hopopts(), etc.). An nftables payload-write expression can rewrite hdrlen after parsing and before the skb rea

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:41b1000b6dc5a263465ce2b19d2e5eca41bc4c8949405542040b36edad5a7e80

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/ipv6/datagram.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"81394827dfb72772c50d0ae3bdfa094428a5d76d","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"931b4a1f13408c2507719890f78f7227c34a0282","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"08464413e628803bd10cb1df68d0138665f2f885","status":"affected","version":"1da177e4c3f41524e886b7f1b8…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:2f02f273c53e2a42395a2a1d6151db652580fa60e7049e48f4f857809446415d · sha256:c895b28e19d47c6b… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/datagram.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":"5.10.259","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessT…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:2f02f273c53e2a42395a2a1d6151db652580fa60e7049e48f4f857809446415d · sha256:c895b28e19d47c6b… · /containers/cna/affected/1

Affected products and versions

2 source assertions

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:2f02f273c53e2a42395a2a1d6151db652580fa60e7049e48f4f857809446415d · sha256:c895b28e19d47c6b… · /containers/cna/affected/0

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:2f02f273c53e2a42395a2a1d6151db652580fa60e7049e48f4f857809446415d · sha256:c895b28e19d47c6b… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:2f02f273c53e2a42395a2a1d6151db652580fa60e7049e48f4f857809446415d · sha256:c895b28e19d47c6b… · /containers/cna/metrics/0/cvssV3_1

Source references

8 source assertions

{"url":"https://git.kernel.org/stable/c/08464413e628803bd10cb1df68d0138665f2f885"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:2f02f273c53e2a42395a2a1d6151db652580fa60e7049e48f4f857809446415d · sha256:c895b28e19d47c6b… · /containers/cna/references/2

{"url":"https://git.kernel.org/stable/c/0d330eff318c0f44d4fb0ad2c2aef38f87f24c90"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:2f02f273c53e2a42395a2a1d6151db652580fa60e7049e48f4f857809446415d · sha256:c895b28e19d47c6b… · /containers/cna/references/4

{"url":"https://git.kernel.org/stable/c/81394827dfb72772c50d0ae3bdfa094428a5d76d"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:2f02f273c53e2a42395a2a1d6151db652580fa60e7049e48f4f857809446415d · sha256:c895b28e19d47c6b… · /containers/cna/references/0

{"url":"https://git.kernel.org/stable/c/931b4a1f13408c2507719890f78f7227c34a0282"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:2f02f273c53e2a42395a2a1d6151db652580fa60e7049e48f4f857809446415d · sha256:c895b28e19d47c6b… · /containers/cna/references/1

{"url":"https://git.kernel.org/stable/c/a29768d56eb3798c052ad3281b05596e695a17af"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:2f02f273c53e2a42395a2a1d6151db652580fa60e7049e48f4f857809446415d · sha256:c895b28e19d47c6b… · /containers/cna/references/3

{"url":"https://git.kernel.org/stable/c/a35daeabb433686234b010ebf7b53778dbd6c9b8"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:2f02f273c53e2a42395a2a1d6151db652580fa60e7049e48f4f857809446415d · sha256:c895b28e19d47c6b… · /containers/cna/references/5

{"url":"https://git.kernel.org/stable/c/dd433671fef381fdaf7b530c631e6b782d66e224"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:2f02f273c53e2a42395a2a1d6151db652580fa60e7049e48f4f857809446415d · sha256:c895b28e19d47c6b… · /containers/cna/references/7

{"url":"https://git.kernel.org/stable/c/eb18a1b1644e4cad978df2131e2bb9a2e6886992"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:2f02f273c53e2a42395a2a1d6151db652580fa60e7049e48f4f857809446415d · sha256:c895b28e19d47c6b… · /containers/cna/references/6

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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