SB2026082876 - Out-of-bounds write in Linux kernel drm vmwgfx driver

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Main Vulnerability Database SB2026082876

SB2026082876 - Out-of-bounds write in Linux kernel drm vmwgfx driver

Published: August 28, 2026

Security Bulletin ID SB2026082876
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-80702)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to an out-of-bounds read and out-of-bounds write in vmwgfx_resource.c when handling resource release and unbind operations. A local user can trigger the vulnerable code paths to cause a denial of service.

The issue is caused by assignments to the guest_memory_size field instead of the adjacent guest_memory_dirty bitfield, which can lead to zero-length walks or wrap-around ranges while processing the MOB bitmap.


Remediation

Install update from vendor's website.

References