SB2026092851 - Out-of-bounds write in Linux kernel drm tiny driver
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB2026092851
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-98142)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/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 write in the cirrus-qemu driver's VRAM handling when updating a display plane for a PCI device with an undersized BAR0. A local user can cause a PCI device with a BAR0 smaller than the expected VRAM size to be bound to the driver to cause a denial of service.
Remediation
Install update from vendor's website.