SB2026092519 - Improper update of reference count in Linux kernel amd pm driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper update of reference count (CVE-ID: CVE-2026-97426)

CWE-ID: CWE-911 - Improper Update of Reference Count

CVSSv4: 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]

The vulnerability allows a local user to cause a power management reference-count imbalance.

The vulnerability exists due to improper reference count management in the amdgpu_set_smartshift_bias function when handling an invalid integer value written to the SmartShift bias sysfs attribute. A local user can write an invalid integer value to the SmartShift bias sysfs attribute to cause a power management reference-count imbalance.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/95e13b25196295654563028861e6802807006ad4
• https://git.kernel.org/stable/c/a4b0c3f5d2287997876d8f711a40d3c0418458d8