CVE-2025-68333 (GCVE-0-2025-68333)

Vulnerability from cvelistv5 – Published: 2025-12-22 16:14 – Updated: 2025-12-22 16:14
VLAI?
Title
sched_ext: Fix possible deadlock in the deferred_irq_workfn()
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 600b4379b9a7ba41340d652211fb29699da4c629 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a257e974210320ede524f340ffe16bf4bf0dda1e (git)
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    Linux Linux Unaffected: 6.17.12 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/sched/ext.c"
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                },
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      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-22T16:14:11.081Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/600b4379b9a7ba41340d652211fb29699da4c629"
        },
        {
          "url": "https://git.kernel.org/stable/c/a257e974210320ede524f340ffe16bf4bf0dda1e"
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      ],
      "title": "sched_ext: Fix possible deadlock in the deferred_irq_workfn()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68333",
    "datePublished": "2025-12-22T16:14:11.081Z",
    "dateReserved": "2025-12-16T14:48:05.297Z",
    "dateUpdated": "2025-12-22T16:14:11.081Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68333\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-22T17:16:01.020\",\"lastModified\":\"2025-12-23T14:51:52.650\",\"vulnStatus\":\"Awaiting Analysis\",\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/600b4379b9a7ba41340d652211fb29699da4c629\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a257e974210320ede524f340ffe16bf4bf0dda1e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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