{
  "cveId": "CVE-2023-53608",
  "url": "https://patchblox.com/security/cve/CVE-2023-53608",
  "summary": "CVE-2023-53608 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53608, released October 4, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  nilfs2: fix potential UAF of struct nilfs_sc_inf...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread()  The finalization of nilfs_segctor_thread() can race with nilfs_segctor_kill_thread() which terminates that thread, potentially causing a use-after-free BUG as KASAN detected.  At the end of nilfs_segctor_thread(), it assigns NULL to \u0022sc_task\u0022 member of \u0022struct nilfs_sc_info\u0022 to indicate the thread has finished, and then notifies nilfs_segctor_kill_thread() of this using waitqueue \u0022sc_wait_task\u0022 on the struct nilfs_sc_info.  However, here, immediately after the NULL assignment to \u0022sc_task\u0022, it is possible that nilfs_segctor_kill_thread() will detect it and return to continue the deallocation, freeing the nilfs_sc_info structure before the thread does the notification.  This fixes the issue by protecting the NULL assignment to \u0022sc_task\u0022 and its notification, with spinlock \u0022sc_state_lock\u0022 of the struct nilfs_sc_info.  Since nilfs_segctor_kill_thread() does a final check to see if \u0022sc_task\u0022 is NULL with \u0022sc_state_lock\u0022 locked, this can eliminate the race.",
  "published": "2025-10-04T16:15:57Z",
  "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": 0.00152,
  "epssPercentile": 0.04415,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.25-1",
      "fix": "DEBIAN-CVE-2023-53608",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53608",
      "released": "2025-10-04T16:15:57Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.25-1",
      "fix": "DEBIAN-CVE-2023-53608",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53608",
      "released": "2025-10-04T16:15:57Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.25-1",
      "fix": "DEBIAN-CVE-2023-53608",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53608",
      "released": "2025-10-04T16:15:57Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}