ghsa-99pp-v74j-jmgv
Vulnerability from github
Published
2025-12-24 15:30
Modified
2025-12-24 15:30
Details

In the Linux kernel, the following vulnerability has been resolved:

bpf: Free special fields when update [lru_,]percpu_hash maps

As [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing calls to 'bpf_obj_free_fields()' in 'pcpu_copy_value()' could cause the memory referenced by BPF_KPTR_{REF,PERCPU} fields to be held until the map gets freed.

Fix this by calling 'bpf_obj_free_fields()' after 'copy_map_value,_long' in 'pcpu_copy_value()'.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-68744"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T13:16:29Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Free special fields when update [lru_,]percpu_hash maps\n\nAs [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing\ncalls to \u0027bpf_obj_free_fields()\u0027 in \u0027pcpu_copy_value()\u0027 could cause the\nmemory referenced by BPF_KPTR_{REF,PERCPU} fields to be held until the\nmap gets freed.\n\nFix this by calling \u0027bpf_obj_free_fields()\u0027 after\n\u0027copy_map_value[,_long]()\u0027 in \u0027pcpu_copy_value()\u0027.",
  "id": "GHSA-99pp-v74j-jmgv",
  "modified": "2025-12-24T15:30:44Z",
  "published": "2025-12-24T15:30:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68744"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3bf1378747e251571e0de15e7e0a6bf2919044e7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4a03d69cece145e4fb527464be29c3806aa3221e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6af6e49a76c9af7d42eb923703e7648cb2bf401a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96a5cb7072cabbac5c66ac9318242c3bdceebb68"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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