Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-99049

Vulnerability identifier: #VU157452

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-2026-99049

CWE-ID: CWE-772

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Linux kernel
SUSE Linux Micro
SUSE Linux Micro Extras
kernel-default
kernel-64kb
kernel-64kb-debugsource
kernel-64kb-devel
kernel-default-devel
kernel-syms
kernel-obs-build
kernel-obs-build-debugsource
kernel-default-debugsource
kernel-default-devel-debuginfo

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel-default - update to 6.4.0-159998.55.1
kernel-64kb - update to 6.4.0-159998.55.1
kernel-64kb-debugsource - update to 6.4.0-159998.55.1
kernel-64kb-devel - update to 6.4.0-159998.55.1
kernel-default-devel - update to 6.4.0-159998.55.1
kernel-syms - update to 6.4.0-159998.55.1
kernel-obs-build - update to 6.4.0-159998.55.1
kernel-obs-build-debugsource - update to 6.4.0-159998.55.1
kernel-default-debugsource - update to 6.4.0-159998.55.1
kernel-default-devel-debuginfo - update to 6.4.0-159998.55.1

• 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

• Missing Release of Resource after Effective Lifetime in Linux kernel gpio driver
• SUSE update for the Linux Kernel