CVE-2026-98527 gpio: zynq: fix runtime PM leak on request error path
A local attacker can trigger a runtime PM leak in the Zynq GPIO driver, preventing the controller from suspending and keeping its clock enabled.
- 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-2026-98527?
CVE-2026-98527 is a denial of service vulnerability in Linux, published on 18 Oct 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:
gpio: zynq: fix runtime PM leak on request error path
pm_runtime_get_sync() leaves the usage counter incremented even when it fails, and zynq_gpio_request() returns the error without dropping it.
gpiolib does not call ->free() when ->request() fails, so zynq_gpio_free(), which holds the only matching pm_runtime_put(), never runs. The reference is leaked and the controller can no longer runtime-suspend, so its clock stays enabled.
Switch to pm_runtime_resume_and_get(), which only increments the usage counter on success.
Which versions are affected by CVE-2026-98527?
How do I fix CVE-2026-98527?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-98527 being exploited?
There is no known exploitation of CVE-2026-98527 in the wild and no public exploit code.
Sources
Also known as AZL-108981, BELL-CVE-2026-98527, DEBIAN-CVE-2026-98527, GHSA-xv89-vpfw-p3mv, UBUNTU-CVE-2026-98527.