{
  "cveId": "CVE-2023-53826",
  "url": "https://patchblox.com/security/cve/CVE-2023-53826",
  "summary": "CVE-2023-53826 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53826, released December 9, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ubi: Fix UAF wear-leveling entry in eraseblk_cou...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show()  Wear-leveling entry could be freed in error path, which may be accessed again in eraseblk_count_seq_show(), for example:  __erase_worker                eraseblk_count_seq_show                                 wl = ubi-\u003Elookuptbl[*block_number] \t\t\t\tif (wl)   wl_entry_destroy     ubi-\u003Elookuptbl[e-\u003Epnum] = NULL     kmem_cache_free(ubi_wl_entry_slab, e) \t\t                   erase_count = wl-\u003Eec  // UAF!  Wear-leveling entry updating/accessing in ubi-\u003Elookuptbl should be protected by ubi-\u003Ewl_lock, fix it by adding ubi-\u003Ewl_lock to serialize wl entry accessing between wl_entry_destroy() and eraseblk_count_seq_show().  Fetch a reproducer in [Link].",
  "published": "2025-12-09T16:17:21Z",
  "severity": "",
  "epss": 0.0025,
  "epssPercentile": 0.16461,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53826",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53826",
      "released": "2025-12-09T16:17:21Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53826",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53826",
      "released": "2025-12-09T16:17:21Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53826",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53826",
      "released": "2025-12-09T16:17:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}