scsi: ufs: core: Fix data race in CPU latency PM QoS request handling

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-40130
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-11-12 11:15:42 UTC
Updated2026-10-21 13:18:19 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Fix data race in CPU latency PM QoS request handling The cpu_latency_qos_add/remove/update_request interfaces lack internal synchronization by design, requiring the caller to ensure thread safety. The current implementation relies on the 'pm_qos_enabled' flag, which is insufficient to prevent concurrent access and cannot serve as a proper synchronization mechanism. This has led to data races and list corruption issues. A typical race condition call trace is: [Thread A] ufshcd_pm_qos_exit() --> cpu_latency_qos_remove_request() --> cpu_latency_qos_apply(); --> pm_qos_update_target() --> plist_del <--(1) delete plist node --> memset(req, 0, sizeof(*req)); --> hba->pm_qos_enabled = false; [Thread B] ufshcd_devfreq_target --> ufshcd_devfreq_scale --> ufshcd_scale_clks --> ufshcd_pm_qos_update <--(2) pm_qos_enabled is true --> cpu_latency_qos_update_request --> pm_qos_update_target --> plist_del <--(3) plist node use-after-free Introduces a dedicated mutex to serialize PM QoS operations, preventing data races and ensuring safe access to PM QoS resources, including sysfs interface reads.

Risk And Classification

EPSS: 0.002000000 probability, percentile 0.092030000 (date 2026-10-19)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 2777e73fc154e2e87233bdcc0e2402b33815198e eee1b13526b8f1e6a2402973d95f9fa854771f57 git Not specified
CNA Linux Linux affected 2777e73fc154e2e87233bdcc0e2402b33815198e d9df61afb8d23c475f1be3c714da2c34c156ab01 git Not specified
CNA Linux Linux affected 2777e73fc154e2e87233bdcc0e2402b33815198e 79dde5f7dc7c038eec903745dc1550cd4139980e git Not specified
CNA Linux Linux affected 6.9 Not specified
CNA Linux Linux unaffected 6.9 semver Not specified
CNA Linux Linux unaffected 6.12.114 6.12.* semver Not specified
CNA Linux Linux unaffected 6.17.3 6.17.* semver Not specified
CNA Linux Linux unaffected 6.18 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d9df61afb8d23c475f1be3c714da2c34c156ab01 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/eee1b13526b8f1e6a2402973d95f9fa854771f57 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/79dde5f7dc7c038eec903745dc1550cd4139980e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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