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

Vulnerability details

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.

Affected software

How to mitigate CVE-2026-90147

External References

• 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

Related Security Bulletins

• Improper control of a resource through its lifetime in Linux kernel clk driver