vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-63852

drm/amdgpu/vcn: set no_user_fence for VCN v4.0.3 enc ring

HIGH
7.8
CVSS Score
Published: July 19, 2026 at 02:04 PM UTC
Updated: October 26, 2026 at 08:00 PM UTC
1 product affected across 1 vendorLinux Kernel

Using Linux by Linux?

Get instant alerts when new vulnerabilities affect Linux - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set no_user_fence for VCN v4.0.3 enc ring VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit ff1a5a125c5a70c328806b9bc01d7d942cf3f9aa)

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
6.13 ≤ v < 6.18.336.19 ≤ v < 7.0.106.5 ≤ v < 6.6.1416.7 ≤ v < 6.12.916.57.1b889ef4ac98837838c38f7b9f72bba2f33ee367d
Vendor states this is fixed in 0177ac6141c8857130cf365369c74dee7b6b1f7f (fixed)
Vendor states this is fixed in 387b7c7667bd5c53549350ddad866d2fcf75a529 (fixed)
Vendor states this is fixed in 4532b52b34e4e4310386e6fdf6a643368599f522 (fixed)
Vendor states this is fixed in 9076a83e5adefd10dc5c967c7b8bde601c4c512a (fixed)
Vendor states this is fixed in c12a5d35033c0640c57c10d7111c010c7b9c2c8e (fixed)
Vendor states this is fixed in 6.12.91 (unaffected)
Vendor states this is fixed in 6.18.33 (unaffected)
Vendor states this is fixed in 6.5 (unaffected)
Vendor states this is fixed in 6.6.141 (unaffected)
Vendor states this is fixed in 7.0.10 (unaffected)
Vendor states this is fixed in 7.1 (unaffected)

References (5)

Patch
Source: cverecord
https://git.kernel.org/stable/c/c12a5d35033c0640c57c10d7111c010c7b9c2c8e
Patch
Source: cverecord
https://git.kernel.org/stable/c/387b7c7667bd5c53549350ddad866d2fcf75a529
Patch
Source: cverecord
https://git.kernel.org/stable/c/9076a83e5adefd10dc5c967c7b8bde601c4c512a
Patch
Source: cverecord
https://git.kernel.org/stable/c/0177ac6141c8857130cf365369c74dee7b6b1f7f
Patch
Source: cverecord
https://git.kernel.org/stable/c/4532b52b34e4e4310386e6fdf6a643368599f522

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusANALYZED
CWE
CWE-20NVD-CWE-noinfo

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card