CVE-2026-97430 xhci: Prevent queuing new commands if xhci is inaccessible
Attackers can cause denial of service by queuing commands when the xHCI controller is inaccessible during suspend/resume cycles.
- 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-2026-97430?
CVE-2026-97430 is a denial of service vulnerability in Linux, published on 24 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:
xhci: Prevent queuing new commands if xhci is inaccessible
Refuse to queue a new command on the command ring if xHC is marked inaccessible with the HCD_FLAG_HW_ACCESSIBLE.
HCD_FLAG_HW_ACCESSIBLE is set and cleared in suspend and resume.
Also print a warning if xhci is being suspended with commands still pending on the command ring.
Which versions are affected by CVE-2026-97430?
How do I fix CVE-2026-97430?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-97430 being exploited?
There is no known exploitation of CVE-2026-97430 in the wild and no public exploit code.
Sources
Also known as AZL-103859, BELL-CVE-2026-97430, DEBIAN-CVE-2026-97430, GHSA-57g2-jm7m-f2mp, UBUNTU-CVE-2026-97430.