{
  "cveId": "CVE-2026-80644",
  "url": "https://patchblox.com/security/cve/CVE-2026-80644",
  "summary": "CVE-2026-80644 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2026-80644, released August 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ocfs2: don\u0027t BUG_ON an invalid journal dinode  [...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ocfs2: don\u0027t BUG_ON an invalid journal dinode  [BUG] A fuzzed OCFS2 image can corrupt the current slot journal dinode while mount is still in progress. The mount path first reports the invalid journal block and then crashes in shutdown:  kernel BUG at fs/ocfs2/journal.c:1034! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI RIP: 0010:ocfs2_journal_toggle_dirty\u002B0x2d6/0x340 fs/ocfs2/journal.c:1034 Call Trace:  ocfs2_journal_shutdown\u002B0x414/0xc30 fs/ocfs2/journal.c:1116  ocfs2_mount_volume fs/ocfs2/super.c:1785 [inline]  ocfs2_fill_super\u002B0x30a9/0x3cd0 fs/ocfs2/super.c:1083  get_tree_bdev_flags\u002B0x38b/0x640 fs/super.c:1698  get_tree_bdev\u002B0x24/0x40 fs/super.c:1721  ocfs2_get_tree\u002B0x21/0x30 fs/ocfs2/super.c:1184  vfs_get_tree\u002B0x9a/0x370 fs/super.c:1758  fc_mount fs/namespace.c:1199 [inline]  do_new_mount_fc fs/namespace.c:3642 [inline]  do_new_mount fs/namespace.c:3718 [inline]  path_mount\u002B0x5b8/0x1ea0 fs/namespace.c:4028  do_mount fs/namespace.c:4041 [inline]  __do_sys_mount fs/namespace.c:4229 [inline]  __se_sys_mount fs/namespace.c:4206 [inline]  __x64_sys_mount\u002B0x282/0x320 fs/namespace.c:4206  ...  [CAUSE] ocfs2_journal_toggle_dirty() used to return -EIO when journal-\u003Ej_bh no longer contained a valid dinode, because the startup and shutdown paths already handled that failure. Commit 10995aa2451a (\u0022ocfs2: Morph the haphazard OCFS2_IS_VALID_DINODE() checks.\u0022) changed the check to a BUG_ON() under the assumption that the journal dinode had already been validated. That turns an unexpected invalid journal dinode during mount teardown into a kernel crash instead of a normal mount failure.  [FIX] Replace the BUG_ON() with WARN_ON() and return -EIO. This keeps the invariant warning for debugging, but restores the original behavior of failing startup or shutdown cleanly instead of panicking the kernel.",
  "published": "2026-08-28T08:16:49Z",
  "severity": "IMPORTANT",
  "cvss": 5.5,
  "epss": 0.0022,
  "epssPercentile": 0.12543,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}