CVE-2024-46866 drm/xe/client: add missing bo locking in show_meminfo()
A race condition in the Linux kernel's Xe driver allows attackers to trigger null pointer dereferences or use-after-free errors, potentially causing system crashes or code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-46866?
CVE-2024-46866 is a high-severity vulnerability in Linux kernel, published on 27 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
drm/xe/client: add missing bo locking in show_meminfo()
bo_meminfo() wants to inspect bo state like tt and the ttm resource, however this state can change at any point leading to stuff like NPD and UAF, if the bo lock is not held. Grab the bo lock when calling bo_meminfo(), ensuring we drop any spinlocks first. In the case of object_idr we now also need to hold a ref.
v2 (MattB) - Also add xe_bo_assert_held()
(cherry picked from commit 4f63d712fa104c3ebefcb289d1e733e86d8698c7)
Weakness: CWE-667
Which versions are affected by CVE-2024-46866?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-46866?
Apply the vendor's patch.
Is CVE-2024-46866 being exploited?
There is no known exploitation of CVE-2024-46866 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-46866, DEBIAN-CVE-2024-46866, GHSA-gfhp-57f6-m54h, UBUNTU-CVE-2024-46866.