CVE-2026-80573 Input: iforce - validate input packet lengths
A missing length validation in the Linux kernel iforce driver allows local attackers to cause a denial of service via malformed USB input packets.
- 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-2026-80573?
CVE-2026-80573 is a denial of service vulnerability in Linux, published on 26 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:
Input: iforce - validate input packet lengths
iforce_process_packet() reads fixed fields from joystick, wheel and status packets without first checking their lengths. In particular, the shared hats-and-buttons helper unconditionally reads data[6]. The status tail is a sequence of 16-bit effect addresses, but an incomplete final address is also consumed. A successful zero-length USB URB additionally reads the packet ID before the common parser is called.
Reject the zero-length USB transfer, require the seven-byte joystick and wheel prefixes and the two-byte status prefix, and consume only complete status-tail addresses.
Which versions are affected by CVE-2026-80573?
How do I fix CVE-2026-80573?
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-2026-80573 being exploited?
There is no known exploitation of CVE-2026-80573 in the wild and no public exploit code.
Sources
Also known as AZL-97707, BELL-CVE-2026-80573, DEBIAN-CVE-2026-80573, GHSA-2cc7-72rv-6m2m, UBUNTU-CVE-2026-80573.