Improper control of a resource through its lifetime in Linux kernel - CVE-2026-90147

Vulnerability identifier: #VU151339

CSH Severity: Low

CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-90147

CWE-ID: CWE-664

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local privileged user to disable and unprepare a clock that was never enabled.

The vulnerability exists due to improper resource lifecycle management in devm_clk_get_optional_enabled_with_rate() when setting a clock rate fails. A local privileged user can invoke the function with a clock rate-setting failure to disable and unprepare a clock that was never enabled.

Linux kernel
Debian Linux
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux (Debian package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
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
linux (Debian package) - update to 6.12.111-1

• https://git.kernel.org/stable/c/0d4d262c1664365e17e0a5ba2ab79f4db484b44e
• https://git.kernel.org/stable/c/647157fecb42b72d930e7b7d0bfbc5f2db9a858a
• https://git.kernel.org/stable/c/9a365f41fe0f227ef5a269e240233bd0bffc66c9
• https://git.kernel.org/stable/c/9d4843f1051259854f724e9cdc5b9eac56327037

• Improper control of a resource through its lifetime in Linux kernel clk driver
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more