CVE-2026-93195 drm/bridge: synopsys: dw-dp: Support unregistering the AUX channel
A missing unregister function in the Synopsys DisplayPort driver causes use-after-free, allowing local attackers to escalate privileges or crash the system.
- 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-2026-93195?
CVE-2026-93195 is an use after free vulnerability in Linux, published on 17 Sep 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/bridge: synopsys: dw-dp: Support unregistering the AUX channel
The DisplayPort AUX channel gets initialized and registered during dw_dp_bind(), but it is never unregistered, which may lead to resource leaks and/or use-after-free.
Add the missing dw_dp_unbind() function to allow the users of the library to handle the required cleanup, i.e. unregister the AUX adapter.
Which versions are affected by CVE-2026-93195?
How do I fix CVE-2026-93195?
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-2026-93195 being exploited?
There is no known exploitation of CVE-2026-93195 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-93195, DEBIAN-CVE-2026-93195, GHSA-ffp4-w5gv-fphv, UBUNTU-CVE-2026-93195.