CVE-2025-40130

{
  "id": "CVE-2025-40130",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-11-12T11:15:42.637",
  "lastModified": "2026-10-21T13:18:19.067",
  "vulnStatus": "Deferred",
  "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 '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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nscsi: ufs: core: Soluciona condición 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 sincronización interna por diseño, lo que requiere que el llamador garantice la seguridad de los hilos. La implementación actual se basa en el indicador 'pm_qos_enabled', el cual es insuficiente para prevenir el acceso concurrente y no puede servir como un mecanismo de sincronización adecuado. Esto ha llevado a condiciones de carrera de datos y problemas de corrupción de listas.\n\nUna traza de llamada de condición de carrera típica es:\n\n[Hilo 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) eliminar nodo plist\n    --> memset(req, 0, sizeof(*req));\n  --> hba->pm_qos_enabled = false;\n\n[Hilo B]\nufshcd_devfreq_target\n  --> ufshcd_devfreq_scale\n    --> ufshcd_scale_clks\n      --> ufshcd_pm_qos_update     <--(2) pm_qos_enabled es verdadero\n        --> cpu_latency_qos_update_request\n          --> pm_qos_update_target\n            --> plist_del          <--(3) uso después de liberación 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."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "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",
          "versions": [
            {
              "version": "2777e73fc154e2e87233bdcc0e2402b33815198e",
              "lessThan": "eee1b13526b8f1e6a2402973d95f9fa854771f57",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "2777e73fc154e2e87233bdcc0e2402b33815198e",
              "lessThan": "d9df61afb8d23c475f1be3c714da2c34c156ab01",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "2777e73fc154e2e87233bdcc0e2402b33815198e",
              "lessThan": "79dde5f7dc7c038eec903745dc1550cd4139980e",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "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",
          "versions": [
            {
              "version": "6.9",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.9",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.114",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.17.3",
              "lessThanOrEqual": "6.17.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "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",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}