CVE-2025-21817 (GCVE-0-2025-21817)
Vulnerability from cvelistv5
Published
2025-02-27 20:04
Modified
2025-06-19 12:56
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: block: mark GFP_NOIO around sysfs ->store() sysfs ->store is called with queue freezed, meantime we have several ->store() callbacks(update_nr_requests, wbt, scheduler) to allocate memory with GFP_KERNEL which may run into direct reclaim code path, then potential deadlock can be caused. Fix the issue by marking NOIO around sysfs ->store()
References
Impacted products
Vendor Product Version
Linux Linux Version: 8985da5481562e96b95e94ed8e5cc9b6565eb82b
Version: c99f66e4084a62a2cc401c4704a84328aeddc9ec
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: mark GFP_NOIO around sysfs -\u003estore()\n\nsysfs -\u003estore is called with queue freezed, meantime we have several\n-\u003estore() callbacks(update_nr_requests, wbt, scheduler) to allocate\nmemory with GFP_KERNEL which may run into direct reclaim code path,\nthen potential deadlock can be caused.\n\nFix the issue by marking NOIO around sysfs -\u003estore()"
        }
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      "providerMetadata": {
        "dateUpdated": "2025-06-19T12:56:45.920Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21817",
    "datePublished": "2025-02-27T20:04:15.988Z",
    "dateReserved": "2024-12-29T08:45:45.774Z",
    "dateUpdated": "2025-06-19T12:56:45.920Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21817\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-27T20:16:04.243\",\"lastModified\":\"2025-10-28T02:53:28.030\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nblock: mark GFP_NOIO around sysfs -\u003estore()\\n\\nsysfs -\u003estore is called with queue freezed, meantime we have several\\n-\u003estore() callbacks(update_nr_requests, wbt, scheduler) to allocate\\nmemory with GFP_KERNEL which may run into direct reclaim code path,\\nthen potential deadlock can be caused.\\n\\nFix the issue by marking NOIO around sysfs -\u003estore()\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: block: mark GFP_NOIO around sysfs -\u0026gt;store() sysfs -\u0026gt;store se llama con la cola congelada, mientras tanto tenemos varias devoluciones de llamadas -\u0026gt;store() (update_nr_requests, wbt, scheduler) para asignar memoria con GFP_KERNEL que puede ejecutarse en una ruta de c\u00f3digo de recuperaci\u00f3n directa, lo que puede provocar un posible bloqueo. Solucione el problema marcando NOIO alrededor de sysfs -\u0026gt;store()\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-667\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13.2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"87D43B7A-D234-4A8A-9769-AAC59CA2B99D\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2566ce907e5d5db8a039647208e029ce559baa31\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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