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7.8

Linux Kernel: Memory Leaks in AMD Display Driver

published 1 year ago
Summary

The Linux kernel's AMD display driver has a bug that can cause memory leaks or crashes. This is fixed in a recent update, so you should make sure your system is up to date to avoid any issues. If you're using an older version, you should update as soon as possible.

What to do
  • Update linux kernel to version 6.12.4.
Affected software
Ecosystem VendorProductAffected versions
Linux linux kernel >= 4.15.0, < 6.12.4
Fix: upgrade to 6.12.4
Original advisory text
drm/amd/display: Fix handling of plane refcount
In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Fix handling of plane refcount

[Why]
The mechanism to backup and restore plane states doesn't maintain
refcount, which can cause issues if the refcount of the plane changes
in between backup and restore operations, such as memory leaks if the
refcount was supposed to go down, or double frees / invalid memory
accesses if the refcount was supposed to go up.

[How]
Cache and re-apply current refcount when restoring plane states.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker full control (estimated)
Severity
7.8 High
Timeline
Published8 Jan 2025
Updated5 Aug 2026
First seen5 Aug 2026
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