FKIE_CVE-2025-40130

Vulnerability from fkie_nvd - Published: 2025-11-12 11:15 - Updated: 2026-10-21 13:18
Severity
Summary
In 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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/79dde5f7dc7c038eec903745dc1550cd4139980e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d9df61afb8d23c475f1be3c714da2c34c156ab01
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eee1b13526b8f1e6a2402973d95f9fa854771f57
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/ufs/core/ufs-sysfs.c",
            "drivers/ufs/core/ufshcd.c",
            "include/ufs/ufshcd.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "eee1b13526b8f1e6a2402973d95f9fa854771f57",
              "status": "affected",
              "version": "2777e73fc154e2e87233bdcc0e2402b33815198e",
              "versionType": "git"
            },
            {
              "lessThan": "d9df61afb8d23c475f1be3c714da2c34c156ab01",
              "status": "affected",
              "version": "2777e73fc154e2e87233bdcc0e2402b33815198e",
              "versionType": "git"
            },
            {
              "lessThan": "79dde5f7dc7c038eec903745dc1550cd4139980e",
              "status": "affected",
              "version": "2777e73fc154e2e87233bdcc0e2402b33815198e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/ufs/core/ufs-sysfs.c",
            "drivers/ufs/core/ufshcd.c",
            "include/ufs/ufshcd.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.114",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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 \u0027pm_qos_enabled\u0027 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  --\u003e cpu_latency_qos_remove_request()\n    --\u003e cpu_latency_qos_apply();\n      --\u003e pm_qos_update_target()\n        --\u003e plist_del              \u003c--(1) delete plist node\n    --\u003e memset(req, 0, sizeof(*req));\n  --\u003e hba-\u003epm_qos_enabled = false;\n\n[Thread B]\nufshcd_devfreq_target\n  --\u003e ufshcd_devfreq_scale\n    --\u003e ufshcd_scale_clks\n      --\u003e ufshcd_pm_qos_update     \u003c--(2) pm_qos_enabled is true\n        --\u003e cpu_latency_qos_update_request\n          --\u003e pm_qos_update_target\n            --\u003e plist_del          \u003c--(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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nscsi: ufs: core: Soluciona condici\u00f3n de carrera de datos en el manejo de solicitudes de QoS de PM de latencia de CPU\n\nLas interfaces cpu_latency_qos_add/remove/update_request carecen de sincronizaci\u00f3n interna por dise\u00f1o, lo que requiere que el llamador garantice la seguridad de los hilos. La implementaci\u00f3n actual se basa en el indicador \u0027pm_qos_enabled\u0027, el cual es insuficiente para prevenir el acceso concurrente y no puede servir como un mecanismo de sincronizaci\u00f3n adecuado. Esto ha llevado a condiciones de carrera de datos y problemas de corrupci\u00f3n de listas.\n\nUna traza de llamada de condici\u00f3n de carrera t\u00edpica es:\n\n[Hilo A]\nufshcd_pm_qos_exit()\n  --\u003e cpu_latency_qos_remove_request()\n    --\u003e cpu_latency_qos_apply();\n      --\u003e pm_qos_update_target()\n        --\u003e plist_del              \u003c--(1) eliminar nodo plist\n    --\u003e memset(req, 0, sizeof(*req));\n  --\u003e hba-\u003epm_qos_enabled = false;\n\n[Hilo B]\nufshcd_devfreq_target\n  --\u003e ufshcd_devfreq_scale\n    --\u003e ufshcd_scale_clks\n      --\u003e ufshcd_pm_qos_update     \u003c--(2) pm_qos_enabled es verdadero\n        --\u003e cpu_latency_qos_update_request\n          --\u003e pm_qos_update_target\n            --\u003e plist_del          \u003c--(3) uso despu\u00e9s de liberaci\u00f3n de nodo plist\n\nIntroduce un mutex dedicado para serializar las operaciones de PM QoS, previniendo condiciones de carrera de datos y asegurando el acceso seguro a los recursos de PM QoS, incluyendo las lecturas de la interfaz sysfs."
    }
  ],
  "id": "CVE-2025-40130",
  "lastModified": "2026-10-21T13:18:19.067",
  "metrics": {},
  "published": "2025-11-12T11:15:42.637",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/79dde5f7dc7c038eec903745dc1550cd4139980e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d9df61afb8d23c475f1be3c714da2c34c156ab01"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eee1b13526b8f1e6a2402973d95f9fa854771f57"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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