{
  "cveId": "CVE-2026-90320",
  "url": "https://patchblox.com/security/cve/CVE-2026-90320",
  "summary": "CVE-2026-90320 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-90320, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ocfs2: validate external xattr entries when read...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ocfs2: validate external xattr entries when reading metadata  ocfs2_validate_xattr_block() checks the xattr block header before the block reaches higher-level xattr users, but it does not verify that a non-indexed block\u0027s xh_count and entry offsets fit inside the block.  Indexed buckets likewise reach list/get consumers after ECC without an entry-bounds check.  Use the flat xattr entry validator for non-indexed external xattr blocks, and use a bucket-specific validator for indexed buckets at metadata read time.  The bucket validator keeps the entry array bounded by the first bucket block while checking name/value offsets against the bucket block they target.  Reject corrupted external xattr metadata before listxattr() or getxattr() can walk out-of-range entry arrays or name/value offsets.  Validation reproduced this kernel report: BUG: KASAN: use-after-free in ocfs2_xattr_list_entries\u002B0xd7/0x190 Read of size 1 at addr ffff88810a654007 by task ocfs2_xattr_lis/630 Call Trace:   dump_stack_lvl\u002B0x66/0xa0   print_report\u002B0xce/0x630   kasan_report\u002B0xe0/0x110   ocfs2_xattr_list_entries\u002B0xd7/0x190   ocfs2_listxattr\u002B0x3f6/0x610   listxattr\u002B0x90/0xe0   path_listxattrat\u002B0xed/0x220   do_syscall_64\u002B0x115/0x6a0   entry_SYSCALL_64_after_hwframe\u002B0x77/0x7f",
  "published": "2026-09-17T17:17:29Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "epss": 0.00181,
  "epssPercentile": 0.0773,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-90320",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90320",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-90320",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90320",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}