{"id":"CVE-2025-40130","state":"PUBLISHED","title":"scsi: ufs: core: Fix data race in CPU latency PM QoS request handling","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ufs: core: Fix data race in CPU latency PM QoS request handling\n\nThe cpu_latency_qos_add/remove/update_request interfaces lack internal\nsynchronization by design, requiring the caller to ensure thread safety.\nThe current implementation relies on the 'pm_qos_enabled' flag, which is\ninsufficient to prevent concurrent access and cannot serve as a proper\nsynchronization mechanism. This has led to data races and list\ncorruption issues.\n\nA typical race condition call trace is:\n\n[Thread A]\nufshcd_pm_qos_exit()\n  --> cpu_latency_qos_remove_request()\n    --> cpu_latency_qos_apply();\n      --> pm_qos_update_target()\n        --> plist_del              <--(1) delete plist node\n    --> memset(req, 0, sizeof(*req));\n  --> hba->pm_qos_enabled = false;\n\n[Thread B]\nufshcd_devfreq_target\n  --> ufshcd_devfreq_scale\n    --> ufshcd_scale_clks\n      --> ufshcd_pm_qos_update     <--(2) pm_qos_enabled is true\n        --> cpu_latency_qos_update_request\n          --> pm_qos_update_target\n            --> plist_del          <--(3) plist node use-after-free\n\nIntroduces a dedicated mutex to serialize PM QoS operations, preventing\ndata races and ensuring safe access to PM QoS resources, including sysfs\ninterface reads.","publishedAt":"2025-11-12T10:23:21.605Z","updatedAt":"2026-10-21T12:37:48.510Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2777e73fc154e2e87233bdcc0e2402b33815198e","status":"affected","lessThan":"eee1b13526b8f1e6a2402973d95f9fa854771f57","versionType":"git"},{"version":"2777e73fc154e2e87233bdcc0e2402b33815198e","status":"affected","lessThan":"d9df61afb8d23c475f1be3c714da2c34c156ab01","versionType":"git"},{"version":"2777e73fc154e2e87233bdcc0e2402b33815198e","status":"affected","lessThan":"79dde5f7dc7c038eec903745dc1550cd4139980e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/ufs/core/ufs-sysfs.c","drivers/ufs/core/ufshcd.c","include/ufs/ufshcd.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.3","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/ufs/core/ufs-sysfs.c","drivers/ufs/core/ufshcd.c","include/ufs/ufshcd.h"]}],"references":["https://git.kernel.org/stable/c/eee1b13526b8f1e6a2402973d95f9fa854771f57","https://git.kernel.org/stable/c/d9df61afb8d23c475f1be3c714da2c34c156ab01","https://git.kernel.org/stable/c/79dde5f7dc7c038eec903745dc1550cd4139980e"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40130.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40130","state":"PUBLISHED","datePublished":"2025-11-12T10:23:21.605Z","dateUpdated":"2026-10-21T12:37:48.510Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.170Z"},"containers":{"cna":{"title":"scsi: ufs: core: Fix data race in CPU latency PM QoS request handling","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ufs: core: Fix data race in CPU latency PM QoS request handling\n\nThe cpu_latency_qos_add/remove/update_request interfaces lack internal\nsynchronization by design, requiring the caller to ensure thread safety.\nThe current implementation relies on the 'pm_qos_enabled' flag, which is\ninsufficient to prevent concurrent access and cannot serve as a proper\nsynchronization mechanism. This has led to data races and list\ncorruption issues.\n\nA typical race condition call trace is:\n\n[Thread A]\nufshcd_pm_qos_exit()\n  --> cpu_latency_qos_remove_request()\n    --> cpu_latency_qos_apply();\n      --> pm_qos_update_target()\n        --> plist_del              <--(1) delete plist node\n    --> memset(req, 0, sizeof(*req));\n  --> hba->pm_qos_enabled = false;\n\n[Thread B]\nufshcd_devfreq_target\n  --> ufshcd_devfreq_scale\n    --> ufshcd_scale_clks\n      --> ufshcd_pm_qos_update     <--(2) pm_qos_enabled is true\n        --> cpu_latency_qos_update_request\n          --> pm_qos_update_target\n            --> plist_del          <--(3) plist node use-after-free\n\nIntroduces a dedicated mutex to serialize PM QoS operations, preventing\ndata races and ensuring safe access to PM QoS resources, including sysfs\ninterface reads."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2777e73fc154e2e87233bdcc0e2402b33815198e","status":"affected","lessThan":"eee1b13526b8f1e6a2402973d95f9fa854771f57","versionType":"git"},{"version":"2777e73fc154e2e87233bdcc0e2402b33815198e","status":"affected","lessThan":"d9df61afb8d23c475f1be3c714da2c34c156ab01","versionType":"git"},{"version":"2777e73fc154e2e87233bdcc0e2402b33815198e","status":"affected","lessThan":"79dde5f7dc7c038eec903745dc1550cd4139980e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/ufs/core/ufs-sysfs.c","drivers/ufs/core/ufshcd.c","include/ufs/ufshcd.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.3","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/ufs/core/ufs-sysfs.c","drivers/ufs/core/ufshcd.c","include/ufs/ufshcd.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/eee1b13526b8f1e6a2402973d95f9fa854771f57"},{"url":"https://git.kernel.org/stable/c/d9df61afb8d23c475f1be3c714da2c34c156ab01"},{"url":"https://git.kernel.org/stable/c/79dde5f7dc7c038eec903745dc1550cd4139980e"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:37:48.510Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.17.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}