CVE-2026-90281
UnknownSummary
In the Linux kernel, the qcom snps-femto-v2 PHY driver enables runtime PM before creating the PHY, while runtime PM callbacks dereference the not-yet-ready hsphy instance. This leaves a window where a suspend callback can trigger a NULL pointer dereference. The fix takes a runtime PM usage reference with pm_runtime_get_noresume() before enabling runtime PM and releases it once the PHY is created.
Risk Assessment
Can cause a kernel crash (NULL pointer dereference) and system unavailability on devices using this Qualcomm PHY driver. Occurrence depends on a timing race during driver initialization.
Recommendation
Update the Linux kernel to a version containing the fix using pm_runtime_get_noresume() and the devres-managed version. No additional configuration is needed after the update.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: phy: qcom: snps-femto-v2: Fix possible NULL-deref on early runtime suspend Runtime PM must be enabled before creating the PHY, since phy_create() only enables runtime PM on the PHY device if it is already enabled on this parent device. However, the runtime PM callbacks dereference the hsphy instance, which is not yet ready, leaving a window where a suspend callback may trigger a NULL pointer dereference. Take a runtime PM usage reference with pm_runtime_get_noresume() before enabling runtime PM and release it once the PHY has been created, so that no runtime suspend can run before the PHY is ready. This also prevents a short window where an unnecessary runtime suspend can occur. Use the devres-managed version to ensure PM runtime is symmetrically disabled during driver removal for proper cleanup.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS