Bug 2451264 (CVE-2026-23283)

Summary: CVE-2026-23283 kernel: regulator: fp9931: Fix PM runtime reference leak in fp9931_hwmon_read()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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OS: Linux   
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A flaw was found in the Linux kernel's `regulator: fp9931` component. This vulnerability occurs when the `fp9931_hwmon_read()` function fails to properly release a power management (PM) runtime reference if a `regmap_read()` operation fails. This oversight can lead to a PM reference leak, potentially causing resource exhaustion and system instability, resulting in a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-03-25 11:07:49 UTC 
In the Linux kernel, the following vulnerability has been resolved:

regulator: fp9931: Fix PM runtime reference leak in fp9931_hwmon_read()

In fp9931_hwmon_read(), if regmap_read() failed, the function returned
the error code without calling pm_runtime_put_autosuspend(), causing
a PM reference leak.
Comment 1 Alexander B 2026-03-25 12:18:01 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026032523-CVE-2026-23283-3d92@gregkh/T