CVE-2026-90328 HID: steam: Reject short reads
A local attacker with physical access can trigger memory corruption in the Linux kernel Steam Controller driver by sending malformed HID reports.
- 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-2026-90328?
CVE-2026-90328 is a memory corruption 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: steam: Reject short reads
Steam Controller FEATURE reports encode the size of the message in the message itself. Previously we were trusting that the size reported matched the size we actually read, leading to a potential issue with short reads. Instead, we should actually verify the length of the read.
Which versions are affected by CVE-2026-90328?
How do I fix CVE-2026-90328?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-90328 being exploited?
There is no known exploitation of CVE-2026-90328 in the wild and no public exploit code.
Sources
Also known as AZL-102203, BELL-CVE-2026-90328, DEBIAN-CVE-2026-90328, GHSA-px28-m9f6-9x2m, UBUNTU-CVE-2026-90328.