CVE-2026-63856

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Source

https://cve.org/CVERecord?id=CVE-2026-63856

Import Source

JSON Data

https://api.test.osv.dev/v1/vulns/CVE-2026-63856

Downstream

Published

2026-07-19T14:04:45.716Z

Modified

2026-07-22T03:31:33.734703880Z

Severity

7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

drm/amdgpu/vcn: set no_user_fence for VCN v2.0 enc/dec rings

Details

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu/vcn: set nouserfence for VCN v2.0 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 e2b5499fca55f1a32960a311bbb62e35891eaf73)

Database specific

{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63856.json"
}

References

Affected packages

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

1b61de45dfaff00b627e47349a019658e39268b9

Fixed

f264019be80de79f84f464846451445923bffea0

Fixed

5e777bc4cbe928ac0fd95e368fee1540f2ce4db2

Fixed

ac06ce5cac9e711281585d09d00c6efcd9b86396

Fixed

c71aecae98e42dcf2baf462df50b3a2cf1a93fe4

Fixed

8d80b293b41fcb5e9396db93e788b0f4ebcbafb7

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-63856.json"

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-63856.json"