CVE-2026-80654 soc: xilinx: Shutdown and free rx mailbox channel
A use-after-free vulnerability in the Xilinx SoC mailbox driver allows local attackers to execute arbitrary code or escalate privileges due to improper channel cleanup.
- 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-2026-80654?
CVE-2026-80654 is an use after free vulnerability in Linux, published on 28 Aug 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:
soc: xilinx: Shutdown and free rx mailbox channel
A mbox rx channel is requested using mbox_request_channel_byname() in probe. In remove callback, the rx mailbox channel is cleaned up when the rx_chan is NULL due to incorrect condition check. The mailbox channel is not shutdown and it can receive messages even after the device removal. This leads to use after free. Also the channel resources are not freed. Fix this by checking the rx_chan correctly.
Which versions are affected by CVE-2026-80654?
How do I fix CVE-2026-80654?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-80654 being exploited?
There is no known exploitation of CVE-2026-80654 in the wild and no public exploit code.
Sources
Also known as AZL-98090, BELL-CVE-2026-80654, DEBIAN-CVE-2026-80654, GHSA-79cq-96j4-g3x2, UBUNTU-CVE-2026-80654.