High 7.8Published Jul 19, 2026

CVE-2026-63855drm/amdgpu/vcn: set no_user_fence for VCN v2.5 enc/dec rings

Updated under an hour ago (Oct 28, 2026, 8:50 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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)

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-20
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	28c17d72072b7ce5cc13a527dcbfc045cc995e7d builds before 2c6fb056567efb49f8674108b86088a1cfaa86d0; 28c17d72072b7ce5cc13a527dcbfc045cc995e7d builds before 8f0ea4524dc71c6c9ec97f2711f46e12f624140f; from 28c17d72072b7ce5cc13a527dcbfc045cc995e7d before 602d4c5872b25ddd4d82fb2025efb9a05b187bb3; 28c17d72072b7ce5cc13a527dcbfc045cc995e7d builds before 5a3c6f76cab164a5d803084908d7050f649ab7f9; 28c17d72072b7ce5cc13a527dcbfc045cc995e7d builds before 4f317863a3ab212a027d8c8c3cc3af4e3fb95704	CNA record
linux linux_kernel linux:linux_kernel	from 5.4 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10; 7.1	NVD

References

References

https://git.kernel.org/stable/c/2c6fb056567efb49f8674108b86088a1cfaa86d0	patch
https://git.kernel.org/stable/c/8f0ea4524dc71c6c9ec97f2711f46e12f624140f	patch
https://git.kernel.org/stable/c/602d4c5872b25ddd4d82fb2025efb9a05b187bb3	patch
https://git.kernel.org/stable/c/5a3c6f76cab164a5d803084908d7050f649ab7f9	patch
https://git.kernel.org/stable/c/4f317863a3ab212a027d8c8c3cc3af4e3fb95704	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.