SB2026090560 - Integer overflow in Linux kernel drm vmwgfx driver
Published: September 5, 2026
Security Bulletin ID
SB2026090560
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Integer overflow (CVE-ID: CVE-2026-80887)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to bypass shader window bounds validation.
The vulnerability exists due to an integer overflow in vmw_shader_define() when processing user-supplied shader size and offset values. A local user can provide a crafted shader size and offset to bypass shader window bounds validation.
The unchecked offset is forwarded to host SVGA shader-create commands.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1bbe7751f5ebac383405ef29a66622d65bd505d3
- https://git.kernel.org/stable/c/54d56d5b42d2e4c72ba6e365e9774da90698aa22
- https://git.kernel.org/stable/c/5c725901908eb1e52a16fc0e2373cb761df42d21
- https://git.kernel.org/stable/c/cfd163169af3be56eaef113c680ea251f0d09189
- https://git.kernel.org/stable/c/d3f44438aa805270aaead3b6840ccaea0f4c11f9