SB2026082439 - NULL pointer dereference in Linux kernel hwss dce110 driver
Published: August 24, 2026
Security Bulletin ID
SB2026082439
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) NULL pointer dereference (CVE-ID: CVE-2026-74732)
CWE-ID: CWE-476 - NULL Pointer Dereference
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 a NULL pointer dereference in dce110_set_avmute in the AMD display driver when turning the display off over HDMI. A local user can trigger the vulnerable code path to cause a denial of service.
The issue affects Southern Islands discrete GPUs and is reached while waiting for AV mute frames.
Remediation
Install update from vendor's website.