CVE-2026-98786
kernel: drm/amd/display: guard dc_sink dereferences in MST mode validation
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 18, 2026
Updated · October 23, 2026
Description
A flaw was found in the Linux kernel's AMD GPU display driver. During DisplayPort Multi-Stream Transport (MST) display disconnection, a race condition can cause the driver to access display data structures without verifying that they remain valid. A local user or physically proximate attacker triggering display mode checks while unplugging an MST display can cause a null pointer dereference, leading to a system crash and a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference