CVE-2026-80887: Linux kernel · drm/vmwgfx: use check_add_overflow for shader size+offset bound
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in d3f44438aa805270aaead3b6840ccaea0f4c11f9 : patch Linux kernel soon.
Data as of 6 Nov 2026, 17:34 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in d3f44438aa805270aaead3b6840ccaea0f4c11f9, cfd163169af3be56eaef113c680ea251f0d09189, 54d56d5b42d2e4c72ba6e365e9774da90698aa22 +2
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available and has been applied in the Linux kernel. Users should update to the fixed versions identified by the commits d3f44438aa805270aaead3b6840ccaea0f4c11f9, cfd163169af3be56eaef113c680ea251f0d09189, 54d56d5b42d2e4c72ba6e365e9774da90698aa22, 5c725901908eb1e52a16fc0e2373cb761df42d21, and 1bbe7751f5ebac383405ef29e66622d65bd505d3. Applying these patches will prevent the overflow and ensure proper validation of shader size and offset.
Description
A vulnerability in the Linux kernel's vmwgfx driver involves improper handling of user-supplied shader window size and offset values. The flaw arises because the addition of size and offset can overflow, causing an incorrect boundary check to pass. This allows an unbounded offset to be used in shader creation commands, potentially leading to out-of-bounds memory access. The issue is fixed by using check_add_overflow() to detect addition overflow and properly validate the shader window against the buffer size.
References
- git.kernel.org/stable/c/1bbe7751f5ebac383405ef29a66622d65bd505d3 (opens in a new tab)
- git.kernel.org/stable/c/d3f44438aa805270aaead3b6840ccaea0f4c11f9 (opens in a new tab)
- git.kernel.org/stable/c/cfd163169af3be56eaef113c680ea251f0d09189 (opens in a new tab)
- git.kernel.org/stable/c/5c725901908eb1e52a16fc0e2373cb761df42d21 (opens in a new tab)
- git.kernel.org/stable/c/54d56d5b42d2e4c72ba6e365e9774da90698aa22 (opens in a new tab)