CVE-2026-90147 clk: devres: fix cleanup in devm_clk_get_optional_enabled_with_rate()
A kernel bug causes a null pointer dereference when clock rate setting fails, potentially leading to a system crash or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-90147?
CVE-2026-90147 is a vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
clk: devres: fix cleanup in devm_clk_get_optional_enabled_with_rate()
devm_clk_get_optional_enabled_with_rate() registers its cleanup action before setting the clock rate. If setting the rate fails, it attempts to disable and unprepare a clock that was never enabled. This issue was spotted while reviewing "rust: clk: add devres-managed clks" [1].
Register the cleanup action only after successfully preparing and enabling the clock.
[1]: https://lore.kernel.org/rust-for-linux/[email protected]
Which versions are affected by CVE-2026-90147?
How do I fix CVE-2026-90147?
Apply the vendor's patch.
Is CVE-2026-90147 being exploited?
There is no known exploitation of CVE-2026-90147 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-90147, DEBIAN-CVE-2026-90147, GHSA-cr6w-c8xq-w69p, UBUNTU-CVE-2026-90147.