SB20261023110 - Missing Release of Resource after Effective Lifetime in Linux kernel gpio driver

Description

This security bulletin contains information about 1 vulnerability.

1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-99049)

CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime

CVSSv4: 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]

The vulnerability allows a local user to prevent the Xilinx GPIO controller from entering runtime suspend, leaving its clock enabled.

The vulnerability exists due to a missing runtime power management reference release in xgpio_request() in the Linux kernel Xilinx GPIO driver when pm_runtime_get_sync() fails. A local user can trigger a GPIO request that encounters this failure to leave the usage counter incremented and prevent the controller from entering runtime suspend, because gpiolib does not invoke the matching free callback after a failed request.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2fd6ecda5d1f47cffcfadddb35ee49402162c724
• https://git.kernel.org/stable/c/a027e0d7765d1531ee39e4dae81951b04f32ba7b
• https://git.kernel.org/stable/c/b07b3925f676640103b3d74b93fc401b1c873d13
• https://git.kernel.org/stable/c/f73ee2bd2293f8cc340061c5229395ace71fc2eb
• https://git.kernel.org/stable/c/ff82fc3a4a1d417dee1229681cc5285986edb1fa