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Linux Kernel NULL Pointer Dereference Vulnerability in DRM MSM A6XX Preemption Handling

Vulnerability

A vulnerability in the Linux kernel's DRM MSM A6XX graphics driver can lead to a NULL pointer dereference. This issue occurs because the function 'preempt_prepare_postamble' was called before checking if 'preempt_postamble_ptr' was valid. If 'preempt_postamble_ptr' is NULL, dereferencing it would cause a crash. The vulnerability affects the stable versions of the Linux kernel.

Impact

The vulnerability can be exploited to cause a denial of service by crashing the system or application using the affected driver.

Added: Jan 14, 2026, 3:40 PM
Updated: Jan 14, 2026, 4:49 PM

Vulnerability Rating

Custom Algorithm
spread
9.0
impact
2.5
exploitability
3.5
remediation
7.7
relevance
2.1
threat
3.2
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.