Improper Validation of Specified Quantity in Input in Linux kernel - CVE-2026-90328
Published: September 18, 2026
Vulnerability identifier: #VU151163
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90328
CWE-ID: CWE-1284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger processing of truncated Steam Controller feature reports.
The vulnerability exists due to improper validation of a declared report length in the steam_recv_report function when handling Steam Controller feature reports. A local user can provide a feature report whose declared length exceeds the number of bytes read to trigger processing of truncated feature reports.
Affected software
Linux kernel
How to mitigate CVE-2026-90328
Install security update from vendor's repository.