Integer underflow in Linux kernel - CVE-2026-93792
Published: September 25, 2026
Vulnerability identifier: #VU152108
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93792
CWE-ID: CWE-191
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an integer underflow in the iwl_mvm_report_wakeup_reasons() WoWLAN wakeup-reason packet handling when processing firmware-reported WoWLAN packets with undersized lengths. A local user can trigger processing of a firmware-reported WoWLAN packet with an undersized length to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-93792
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3