CVE-2025-38477 (GCVE-0-2025-38477)
Vulnerability from cvelistv5
Published
2025-07-28 11:21
Modified
2026-08-05 12:02
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: Fix race condition on qfq_aggregate A race condition can occur when 'agg' is modified in qfq_change_agg (called during qfq_enqueue) while other threads access it concurrently. For example, qfq_dump_class may trigger a NULL dereference, and qfq_delete_class may cause a use-after-free. This patch addresses the issue by: 1. Moved qfq_destroy_class into the critical section. 2. Added sch_tree_lock protection to qfq_dump_class and qfq_dump_class_stats.
References
Impacted products
Vendor Product Version
Linux Linux Version: 462dbc9101acd38e92eda93c0726857517a24bbd
Version: 462dbc9101acd38e92eda93c0726857517a24bbd
Version: 462dbc9101acd38e92eda93c0726857517a24bbd
Version: 462dbc9101acd38e92eda93c0726857517a24bbd
Version: 462dbc9101acd38e92eda93c0726857517a24bbd
Version: 462dbc9101acd38e92eda93c0726857517a24bbd
Version: 462dbc9101acd38e92eda93c0726857517a24bbd
Version: 462dbc9101acd38e92eda93c0726857517a24bbd
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For example, qfq_dump_class may trigger a NULL\\ndereference, and qfq_delete_class may cause a use-after-free.\\n\\nThis patch addresses the issue by:\\n\\n1. Moved qfq_destroy_class into the critical section.\\n\\n2. Added sch_tree_lock protection to qfq_dump_class and\\nqfq_dump_class_stats.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.297\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.241\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.190\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.147\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.100\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.40\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.15.8\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.16\", \"versionStartIncluding\": \"3.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-07-30T05:54:32.482Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-38477\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-30T05:54:32.482Z\", \"dateReserved\": \"2025-04-16T04:51:24.021Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-07-28T11:21:38.319Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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