Unchecked Return Value in Linux kernel - CVE-2026-89462
Published: September 12, 2026
Vulnerability identifier: #VU149343
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89462
CWE-ID: CWE-252
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause power-supply properties to report incorrect voltage or state-of-charge values.
The vulnerability exists due to improper error handling in the max17040 power supply driver when an I2C register read fails. A local user can access power-supply properties during a failed I2C register read to cause power-supply properties to report incorrect voltage or state-of-charge values.
A polling worker may replace the cached state of charge with an invalid value and emit a spurious change event.
Affected software
Linux kernel
How to mitigate CVE-2026-89462
Install security update from vendor's repository.