Runtime PM reference leak in Linux kernel zynq GPIO driver
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from CNA.
Summary
The zynq GPIO driver in the Linux kernel from 3.17 leaks a runtime power management reference when a GPIO request fails. The failed request leaves the usage counter incremented, so the controller cannot runtime-suspend and its clock stays enabled.
Written with Claude Haiku 5.5 from the sources below · 2026-11-07
Description from the CNA
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
The Linux kernel is fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, 6.18.55, 7.2.9 and 7.3.
Written with Claude Haiku 5.5 from the sources below · 2026-11-07
- Fix · CNA Linux (Linux) Fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, 6.18.55, 7.2.9, 7.3
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 7 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Container Platform 5
Timeline
- 2026-10-18 Threatist record created from CVE-2026-98527
- 2026-10-18 Alias added: GHSA-xv89-vpfw-p3mv
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-10-20 Affected versions changed · Red Hat
- 2026-10-20 CVSS score added · Red Hat
- 2026-11-07 Affected versions changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/e380fba02908b809f5bbef371259003cf5887bb4
- https://git.kernel.org/stable/c/a3e9b7f7c9558f8c9592f8f817557bff98707bb3
- https://git.kernel.org/stable/c/60a76cdd92e25f576dc58d756a565760dde1f7a1
- https://git.kernel.org/stable/c/25c08be2a5e7715f19a6e02bbe9b0e5f01c77aac
- https://git.kernel.org/stable/c/6e05f1c614a57a5d4c364dd12e20c6fd012f9d3e
- https://git.kernel.org/stable/c/58a417a19d80141fff3abe6004e2e47285506e73
- https://git.kernel.org/stable/c/6e20dabffbcd7b222d8e7bb85a7d8e8325df7699
- https://git.kernel.org/stable/c/e9438ab5328a177c9c0e5df87eb92a7162841e98
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Sources
- CVE-2026-98527 · CVE Program
- CVE-2026-98527 · NVD
- FIRST EPSS
- GHSA-xv89-vpfw-p3mv · GitHub Advisory Database · CC BY 4.0
- CVE-2026-98527 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences