Improper update of reference count in Linux kernel - CVE-2026-98527

Vulnerability identifier: #VU156829

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-2026-98527

CWE-ID: CWE-911

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to failure to release a runtime power management reference in zynq_gpio_request() when pm_runtime_get_sync() fails during a GPIO request. 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.

Linux kernel
Ubuntu
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-aws (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-nvidia-tegra (Ubuntu package) - update to 5.15.0-1070.72
linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1059.59
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1070.72~20.04.1
linux (Ubuntu package) - update to 7.0.0-42.42
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17

• https://git.kernel.org/stable/c/25c08be2a5e7715f19a6e02bbe9b0e5f01c77aac
• https://git.kernel.org/stable/c/58a417a19d80141fff3abe6004e2e47285506e73
• https://git.kernel.org/stable/c/60a76cdd92e25f576dc58d756a565760dde1f7a1
• https://git.kernel.org/stable/c/6e05f1c614a57a5d4c364dd12e20c6fd012f9d3e
• https://git.kernel.org/stable/c/6e20dabffbcd7b222d8e7bb85a7d8e8325df7699
• https://git.kernel.org/stable/c/a3e9b7f7c9558f8c9592f8f817557bff98707bb3
• https://git.kernel.org/stable/c/e380fba02908b809f5bbef371259003cf5887bb4
• https://git.kernel.org/stable/c/e9438ab5328a177c9c0e5df87eb92a7162841e98

• Improper update of reference count in Linux kernel gpio driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more
• Ubuntu update for linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-nvidia-tegra-igx
• Ubuntu update for linux, linux-aws, linux-aws-5.15 and more