CVE-2026-23338
Published: March 25, 2026· Updated: Mar 25, 2026
Official Description
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings
Userspace can either deliberately pass in the too small num_fences, or the
required number can legitimately grow between the two calls to the userq
wait ioctl. In both cases we do not want the emit the kernel warning
backtrace since nothing is wrong with the kernel and userspace will simply
get an errno reported back. So lets simply drop the WARN_ONs.
(cherry picked from commit 2c333ea579de6cc20ea7bc50e9595ef72863e65c)
Technical Analysis
CVE-2026-23338 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
Affected Vendors & Products
Exploit & PoC Resources
All References (3)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-23338 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts