CVE-2025-68309 PCI/AER: Fix NULL pointer access by aer_info
A NULL pointer dereference in the Linux kernel PCI/AER subsystem can cause a kernel panic, leading to denial of service.
- 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-2025-68309?
CVE-2025-68309 is a vulnerability in Linux, published on 16 Dec 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:
PCI/AER: Fix NULL pointer access by aer_info
The kzalloc(GFP_KERNEL) may return NULL, so all accesses to aer_info->xxx will result in kernel panic. Fix it.
Which versions are affected by CVE-2025-68309?
How do I fix CVE-2025-68309?
Apply the vendor's patch.
Is CVE-2025-68309 being exploited?
There is no known exploitation of CVE-2025-68309 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-68309, DEBIAN-CVE-2025-68309, GHSA-h3x8-qr26-4mxq, ROOT-OS-DEBIAN-13-CVE-2025-68309, ROOT-OS-UBUNTU-2204-CVE-2025-68309, ROOT-OS-UBUNTU-2404-CVE-2025-68309 and 1 more.