CVE-2026-90331 HID: asus: refactor the two workqueues and init sequence
A use-after-free vulnerability in the Linux kernel HID ASUS driver allows local attackers to execute arbitrary code or escalate privileges.
- 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-2026-90331?
CVE-2026-90331 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:
HID: asus: refactor the two workqueues and init sequence
Multiple issues have been found within the hid-asus driver: - unchecked size in asus_raw_event() - unclean teardown of asus_probe on failure - possible use-after-free in asus_probe - multiple workqueue used for jobs where one was enough - sleeping calls in atomic context - packets of incorrect size being sent to the keyboard controller
Join the two workqueues into one reusing the stopping mechanism of the brightness workqueue, use the joined workqueue to also move the asus_wmi_send_event() sleeping call away from atomic context and add a size check in asus_raw_event().
Which versions are affected by CVE-2026-90331?
How do I fix CVE-2026-90331?
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-2026-90331 being exploited?
There is no known exploitation of CVE-2026-90331 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-90331, GHSA-crc6-vh29-6g24, UBUNTU-CVE-2026-90331.