{
  "cveId": "CVE-2021-47254",
  "url": "https://patchblox.com/security/cve/CVE-2021-47254",
  "summary": "CVE-2021-47254 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47254, released May 21, 2024. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  gfs2: Fix use-after-free in gfs2_glock_shrink_sc...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  gfs2: Fix use-after-free in gfs2_glock_shrink_scan  The GLF_LRU flag is checked under lru_lock in gfs2_glock_remove_from_lru() to remove the glock from the lru list in __gfs2_glock_put().  On the shrink scan path, the same flag is cleared under lru_lock but because of cond_resched_lock(\u0026lru_lock) in gfs2_dispose_glock_lru(), progress on the put side can be made without deleting the glock from the lru list.  Keep GLF_LRU across the race window opened by cond_resched_lock(\u0026lru_lock) to ensure correct behavior on both sides - clear GLF_LRU after list_del under lru_lock.",
  "published": "2024-05-21T15:15:14Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00243,
  "epssPercentile": 0.15566,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47254",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47254",
      "released": "2024-05-21T15:15:14Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47254",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47254",
      "released": "2024-05-21T15:15:14Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47254",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47254",
      "released": "2024-05-21T15:15:14Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}