CVE-2026-43206 drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()
An out-of-bounds write in the Linux kernel's AMD KFD driver allows unprivileged users to trigger kernel memory corruption, potentially leading to 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-2026-43206?
CVE-2026-43206 is a high-severity memory corruption vulnerability in Linux kernel, published on 6 May 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/amdkfd: Fix out-of-bounds write in kfd_event_page_set()
The kfd_event_page_set() function writes KFD_SIGNAL_EVENT_LIMIT * 8 bytes via memset without checking the buffer size parameter. This allows unprivileged userspace to trigger an out-of bounds kernel memory write by passing a small buffer, leading to potential privilege escalation.
Weakness: CWE-787
Which versions are affected by CVE-2026-43206?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43206?
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-2026-43206 being exploited?
There is no known exploitation of CVE-2026-43206 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-43206, DEBIAN-CVE-2026-43206, GHSA-h9w8-48v5-m9c9, ROOT-OS-DEBIAN-11-CVE-2026-43206, ROOT-OS-UBUNTU-2204-CVE-2026-43206, ROOT-OS-UBUNTU-2404-CVE-2026-43206 and 1 more.