CVE-2026-31765: Linux kernel · drm/amdgpu: Change AMDGPU_VA_RESERVED_TRAP_SIZE to 64KB
Source GCVE Database
Not known to be exploited · CVSS 5.5 Medium.
Data as of 27 Oct 2026, 00:27 UTC
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 1 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
A patch has been applied to the Linux kernel AMDGPU driver that changes AMDGPU_VA_RESERVED_TRAP_SIZE to 64KB and aligns KFD_CWSR_TBA_TMA_SIZE with the AMD GPU page size. Users should update their Linux kernel to a version including this fix to prevent kernel crashes. No additional mitigation steps are indicated.
Description
CVE-2026-31765 addresses a vulnerability in the Linux kernel's AMDGPU driver related to mismatched reserved trap size and allocation size on systems using 64KB pages. The hardcoded AMDGPU_VA_RESERVED_TRAP_SIZE was 8KB, while the allocation size (KFD_CWSR_TBA_TMA_SIZE) became 128KB on 64KB page systems, causing kernel crashes during certain GPU operations. The patch changes the reserved trap size to 64KB and aligns allocation size with the AMD GPU page size, preventing kernel crashes.
References
- nvd.nist.gov/vuln/detail/CVE-2026-31765 (opens in a new tab)
- git.kernel.org/stable/c/4487571ef17a30d274600b3bd6965f497a881299 (opens in a new tab)
- git.kernel.org/stable/c/6b2614a0ff05a2d2836311425091c8feca6f0c21 (opens in a new tab)
- git.kernel.org/stable/c/77c918eaa4c916751769242567407f61c6af142a (opens in a new tab)
- git.kernel.org/stable/c/d3508cf822c4d96d3e492210314f8f6f2da7df58 (opens in a new tab)