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CVE-2026-63855

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set no_user_fence for VCN v2.5 enc/dec rings VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit efc9dd5590894109bce9a0bfe1fa5592dd6b20b1)
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ed30296dc57f4b91b9188ee620a49a870285e800189e54dc317e971d9b7f0e2e
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/gpu/drm/amd/amdgpu/vcn_v2_5.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.4"},{"lessThan":"5.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.141","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.91","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.33","versionType":"semver…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:26edb5e40247c19861be5f6075cd17c376e5fc579ef3b3dbbba2b1dcd16689e0 · sha256:d8f9e9dd708465fc… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2c6fb056567efb49f8674108b86088a1cfaa86d0","status":"affected","version":"28c17d72072b7ce5cc13a527dcbfc045cc995e7d","versionType":"git"},{"lessThan":"8f0ea4524dc71c6c9ec97f2711f46e12f624140f","status":"affected","version":"28c17d72072b7ce5cc13a527dcbfc045cc995e7d","versionType":"git"},{"lessThan":"602d4c5872b25ddd4d82fb2025efb9a05b187bb3","status":"affected","version":"28c17d72…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:26edb5e40247c19861be5f6075cd17c376e5fc579ef3b3dbbba2b1dcd16689e0 · sha256:d8f9e9dd708465fc… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.4"},{"lessThan":"5.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.141","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.91","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.33","versionType":"semver…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:26edb5e40247c19861be5f6075cd17c376e5fc579ef3b3dbbba2b1dcd16689e0 · sha256:d8f9e9dd708465fc… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2c6fb056567efb49f8674108b86088a1cfaa86d0","status":"affected","version":"28c17d72072b7ce5cc13a527dcbfc045cc995e7d","versionType":"git"},{"lessThan":"8f0ea4524dc71c6c9ec97f2711f46e12f624140f","status":"affected","version":"28c17d72072b7ce5cc13a527dcbfc045cc995e7d","versionType":"git"},{"lessThan":"602d4c5872b25ddd4d82fb2025efb9a05b187bb3","status":"affected","version":"28c17d72…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:26edb5e40247c19861be5f6075cd17c376e5fc579ef3b3dbbba2b1dcd16689e0 · sha256:d8f9e9dd708465fc… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/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:v2:26edb5e40247c19861be5f6075cd17c376e5fc579ef3b3dbbba2b1dcd16689e0 · sha256:d8f9e9dd708465fc… · /containers/cna/metrics/0/cvssV3_1

Source references

5 source assertions
{"url":"https://git.kernel.org/stable/c/2c6fb056567efb49f8674108b86088a1cfaa86d0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:26edb5e40247c19861be5f6075cd17c376e5fc579ef3b3dbbba2b1dcd16689e0 · sha256:d8f9e9dd708465fc… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/4f317863a3ab212a027d8c8c3cc3af4e3fb95704"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:26edb5e40247c19861be5f6075cd17c376e5fc579ef3b3dbbba2b1dcd16689e0 · sha256:d8f9e9dd708465fc… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/5a3c6f76cab164a5d803084908d7050f649ab7f9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:26edb5e40247c19861be5f6075cd17c376e5fc579ef3b3dbbba2b1dcd16689e0 · sha256:d8f9e9dd708465fc… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/602d4c5872b25ddd4d82fb2025efb9a05b187bb3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:26edb5e40247c19861be5f6075cd17c376e5fc579ef3b3dbbba2b1dcd16689e0 · sha256:d8f9e9dd708465fc… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/8f0ea4524dc71c6c9ec97f2711f46e12f624140f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:26edb5e40247c19861be5f6075cd17c376e5fc579ef3b3dbbba2b1dcd16689e0 · sha256:d8f9e9dd708465fc… · /containers/cna/references/1

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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