FKIE_CVE-2025-68333

Vulnerability from fkie_nvd - Published: 2025-12-22 17:16 - Updated: 2026-10-19 21:10
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: sched_ext: Fix possible deadlock in the deferred_irq_workfn() For PREEMPT_RT=y kernels, the deferred_irq_workfn() is executed in the per-cpu irq_work/* task context and not disable-irq, if the rq returned by container_of() is current CPU's rq, the following scenarios may occur: lock(&rq->__lock); <Interrupt> lock(&rq->__lock); This commit use IRQ_WORK_INIT_HARD() to replace init_irq_work() to initialize rq->scx.deferred_irq_work, make the deferred_irq_workfn() is always invoked in hard-irq context.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/541959b2fadb832a7d0ceb95041dc52bdcf6bff7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/600b4379b9a7ba41340d652211fb29699da4c629Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a257e974210320ede524f340ffe16bf4bf0dda1ePatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.18
linux linux_kernel 6.18
linux linux_kernel 6.18
linux linux_kernel 6.18
linux linux_kernel 6.18
linux linux_kernel 6.18
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/sched/ext.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "541959b2fadb832a7d0ceb95041dc52bdcf6bff7",
              "status": "affected",
              "version": "5b26f7b920f76b2b9cc398c252a9e35e44bf5bb9",
              "versionType": "git"
            },
            {
              "lessThan": "600b4379b9a7ba41340d652211fb29699da4c629",
              "status": "affected",
              "version": "5b26f7b920f76b2b9cc398c252a9e35e44bf5bb9",
              "versionType": "git"
            },
            {
              "lessThan": "a257e974210320ede524f340ffe16bf4bf0dda1e",
              "status": "affected",
              "version": "5b26f7b920f76b2b9cc398c252a9e35e44bf5bb9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/sched/ext.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.68",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F8C0E8D6-8E82-4C89-9E21-22B487A9E76D",
              "versionEndExcluding": "6.12.68",
              "versionStartIncluding": "6.12",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F127AFC1-F5BC-4C9F-88BE-2D2092F99E33",
              "versionEndExcluding": "6.17.12",
              "versionStartIncluding": "6.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.18:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "DD01661D-DFC8-4B6D-80E7-46D203CC4565",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.18:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "A8A65C5A-918F-4E0B-8E98-08A29FFBA58A",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.18:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "26CA425A-E44F-49D2-92D9-1DDD56398440",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.18:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "BEEBB43A-4C9F-46BE-AA6D-9DBFD2244E55",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.18:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "2545FB83-C4A6-4F62-9ED1-09F75D2E3C78",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.18:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "E955EC5D-4684-4B5D-AE4D-F2BF9ADDBA1D",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Fix possible deadlock in the deferred_irq_workfn()\n\nFor PREEMPT_RT=y kernels, the deferred_irq_workfn() is executed in\nthe per-cpu irq_work/* task context and not disable-irq, if the rq\nreturned by container_of() is current CPU\u0027s rq, the following scenarios\nmay occur:\n\nlock(\u0026rq-\u003e__lock);\n\u003cInterrupt\u003e\n  lock(\u0026rq-\u003e__lock);\n\nThis commit use IRQ_WORK_INIT_HARD() to replace init_irq_work() to\ninitialize rq-\u003escx.deferred_irq_work, make the deferred_irq_workfn()\nis always invoked in hard-irq context."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:\\n\\nsched_ext: Corrige posible interbloqueo en deferred_irq_workfn()\\n\\nPara kernels PREEMPT_RT=y, deferred_irq_workfn() se ejecuta en el contexto de tarea per?cpu irq_work/* y no en disable?irq. Si el rq devuelto por container_of() corresponde al rq de la CPU actual, pueden producirse los siguientes escenarios:\\n\\nlock(\u0026rq -\u003e __lock);\\n\u003cInterrupt\u003e\\n  lock(\u0026rq -\u003e __lock);\\n\\nEste commit utiliza IRQ_WORK_INIT_HARD() para reemplazar init_irq_work() y inicializar rq -\u003e scx.deferred_irq_work, de modo que deferred_irq_workfn() siempre se invoque en contexto hard?irq."
    }
  ],
  "id": "CVE-2025-68333",
  "lastModified": "2026-10-19T21:10:00.160",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-12-22T17:16:01.020",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/541959b2fadb832a7d0ceb95041dc52bdcf6bff7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/600b4379b9a7ba41340d652211fb29699da4c629"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a257e974210320ede524f340ffe16bf4bf0dda1e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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