CVE-2026-53329 drm/amd/display: Use krealloc_array() in dal_vector_reserve()
Integer overflow in Linux kernel AMD display driver allows heap overflow, 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-2026-53329?
CVE-2026-53329 is a high-severity vulnerability in Linux kernel, published on 1 Jul 2026. 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/amd/display: Use krealloc_array() in dal_vector_reserve()
[Why & How] dal_vector_reserve() computes the allocation size as "capacity * vector->struct_size" using uint32_t arithmetic, which can silently wrap to a small value on overflow. This would cause krealloc to return a smaller buffer than expected, leading to heap overflows on subsequent vector appends.
Replace krealloc() with krealloc_array() which performs an internal overflow check and returns NULL on wrap, preventing the issue.
(cherry picked from commit 37668568641ccc4cc1dbca4923d0a16609dd5707)
Which versions are affected by CVE-2026-53329?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53329?
Apply the vendor's patch.
Is CVE-2026-53329 being exploited?
There is no known exploitation of CVE-2026-53329 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-53329, DEBIAN-CVE-2026-53329, GHSA-j7g7-x525-gxgj, ROOT-OS-DEBIAN-11-CVE-2026-53329, ROOT-OS-UBUNTU-2204-CVE-2026-53329, ROOT-OS-UBUNTU-2404-CVE-2026-53329 and 1 more.