Reliance on undefined behavior in Linux kernel - CVE-2026-80999
Published: September 13, 2026
Vulnerability identifier: #VU149472
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80999
CWE-ID: CWE-758
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to trigger a kernel warning.
The vulnerability exists due to improper GPIO API selection in the rtl83xx_reset_assert() and rtl83xx_reset_deassert() helpers when handling reset GPIOs controlled by sleeping controllers. A local privileged user can trigger device probing with such a GPIO configuration to trigger a kernel warning.
Affected software
Linux kernel
How to mitigate CVE-2026-80999
Install security update from vendor's repository.