CVE-2026-98762 USB: dwc2: shut down wakeup timer before freeing HCD state
A use-after-free in the Linux kernel DWC2 USB driver allows local attackers to cause a denial of service or potentially execute code by triggering a race condition during HCD removal.
- 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-2026-98762?
CVE-2026-98762 is an use after free vulnerability in Linux, published on 18 Oct 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:
USB: dwc2: shut down wakeup timer before freeing HCD state
dwc2_wakeup_detected() accesses the DWC2 host state and can rearm the wakeup timer. dwc2_hcd_free() currently deletes the timer only after freeing host-owned state, and timer_delete() does not synchronize a callback or prevent it from being queued again.
Stop and shut down the timer in dwc2_hcd_release(), before the HCD resources are freed. This covers both the HCD initialization error path and normal HCD removal.
Which versions are affected by CVE-2026-98762?
How do I fix CVE-2026-98762?
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-2026-98762 being exploited?
There is no known exploitation of CVE-2026-98762 in the wild and no public exploit code.
Sources
Also known as AZL-108869, BELL-CVE-2026-98762, DEBIAN-CVE-2026-98762, GHSA-g24x-rpv9-j8mw, UBUNTU-CVE-2026-98762.