CVE-2025-40059 coresight: Fix incorrect handling for return value of devm_kzalloc
A null pointer dereference in the Linux kernel Coresight driver can cause a system crash, requiring local access to exploit.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-40059?
CVE-2025-40059 is a vulnerability in Linux, published on 28 Oct 2025. 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:
coresight: Fix incorrect handling for return value of devm_kzalloc
The return value of devm_kzalloc could be an null pointer, use "!desc.pdata" to fix incorrect handling return value of devm_kzalloc.
Which versions are affected by CVE-2025-40059?
How do I fix CVE-2025-40059?
Apply the vendor's patch.
Is CVE-2025-40059 being exploited?
There is no known exploitation of CVE-2025-40059 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-40059, DEBIAN-CVE-2025-40059, GHSA-p5wm-p7x9-9mrc, ROOT-OS-DEBIAN-13-CVE-2025-40059, ROOT-OS-UBUNTU-2404-CVE-2025-40059, UBUNTU-CVE-2025-40059.