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CVE-2026-98527: gpio: zynq: fix runtime PM leak on request error path

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-19

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.

Affected products

• Linux kernel: 3.17 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• 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

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