CVE-2024-49865 drm/xe/vm: move xa_alloc to prevent UAF
A local attacker can trigger a use-after-free in the Linux kernel's Xe driver by racing VM creation and destruction, potentially leading to code execution or privilege escalation.
- 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-2024-49865?
CVE-2024-49865 is a high-severity use after free vulnerability in Linux kernel, published on 21 Oct 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/vm: move xa_alloc to prevent UAF
Evil user can guess the next id of the vm before the ioctl completes and then call vm destroy ioctl to trigger UAF since create ioctl is still referencing the same vm. Move the xa_alloc all the way to the end to prevent this.
v2: - Rebase
(cherry picked from commit dcfd3971327f3ee92765154baebbaece833d3ca9)
Weakness: CWE-416
Which versions are affected by CVE-2024-49865?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-49865?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2024-49865 being exploited?
There is no known exploitation of CVE-2024-49865 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-49865, DEBIAN-CVE-2024-49865, GHSA-533j-v9v8-3c94, UBUNTU-CVE-2024-49865.