CVE-2023-52649 drm/vkms: Avoid reading beyond LUT array
A local attacker can trigger an out-of-bounds read in the Linux kernel's virtual KMS driver, potentially leaking memory or causing a system crash.
- 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-2023-52649?
CVE-2023-52649 is a high-severity memory corruption vulnerability in Linux kernel, published on 1 May 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/vkms: Avoid reading beyond LUT array
When the floor LUT index (drm_fixp2int(lut_index) is the last index of the array the ceil LUT index will point to an entry beyond the array. Make sure we guard against it and use the value of the floor LUT index.
v3: - Drop bits from commit description that didn't contribute anything of value
Weakness: CWE-129
Which versions are affected by CVE-2023-52649?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-52649?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-52649 being exploited?
There is no known exploitation of CVE-2023-52649 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-52649, DEBIAN-CVE-2023-52649, GHSA-vpc3-576f-68c6, UBUNTU-CVE-2023-52649.