CVE-2026-80644 (GCVE-0-2026-80644)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:48 – Updated: 2026-08-28 06:48
VLAI
Title
ocfs2: don't BUG_ON an invalid journal dinode
Summary
In the Linux kernel, the following vulnerability has been resolved: ocfs2: don't 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+0x2d6/0x340 fs/ocfs2/journal.c:1034 Call Trace: ocfs2_journal_shutdown+0x414/0xc30 fs/ocfs2/journal.c:1116 ocfs2_mount_volume fs/ocfs2/super.c:1785 [inline] ocfs2_fill_super+0x30a9/0x3cd0 fs/ocfs2/super.c:1083 get_tree_bdev_flags+0x38b/0x640 fs/super.c:1698 get_tree_bdev+0x24/0x40 fs/super.c:1721 ocfs2_get_tree+0x21/0x30 fs/ocfs2/super.c:1184 vfs_get_tree+0x9a/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+0x5b8/0x1ea0 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+0x282/0x320 fs/namespace.c:4206 ... [CAUSE] ocfs2_journal_toggle_dirty() used to return -EIO when journal->j_bh no longer contained a valid dinode, because the startup and shutdown paths already handled that failure. Commit 10995aa2451a ("ocfs2: Morph the haphazard OCFS2_IS_VALID_DINODE() checks.") 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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 10995aa2451afa20b721cc7de856cae1a13dba57 , < bf1d59cf2ac8a1730607ebaa0bc0dc6d00f197d0 (git)
Affected: 10995aa2451afa20b721cc7de856cae1a13dba57 , < 86509c5296fe46ad6bcdd83931a53c2c6b7913a8 (git)
Affected: 10995aa2451afa20b721cc7de856cae1a13dba57 , < 12c32a7350b670aaaaf2e01583d8648ec0c9755c (git)
Affected: 10995aa2451afa20b721cc7de856cae1a13dba57 , < b460f8d01a12061853d02c8fb693fb42450acd7d (git)
Affected: 10995aa2451afa20b721cc7de856cae1a13dba57 , < a06eec15596e5801bad59ad16cd2bf4f0fa839a1 (git)
Affected: 10995aa2451afa20b721cc7de856cae1a13dba57 , < 3852478d34c7baa490ba9c7374ee901a56eea577 (git)
Affected: 10995aa2451afa20b721cc7de856cae1a13dba57 , < 5b33f99f3e48465bd93219495381a5aef4fa967f (git)
Affected: 10995aa2451afa20b721cc7de856cae1a13dba57 , < c0438198c28b1d22c272751af5e717c11d9fa8dd (git)
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Linux Linux Affected: 2.6.29
Unaffected: 0 , < 2.6.29 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: don\u0027t BUG_ON an invalid journal dinode\n\n[BUG]\nA fuzzed OCFS2 image can corrupt the current slot journal dinode while\nmount is still in progress. The mount path first reports the invalid\njournal block and then crashes in shutdown:\n\nkernel BUG at fs/ocfs2/journal.c:1034!\nOops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\nRIP: 0010:ocfs2_journal_toggle_dirty+0x2d6/0x340 fs/ocfs2/journal.c:1034\nCall Trace:\n ocfs2_journal_shutdown+0x414/0xc30 fs/ocfs2/journal.c:1116\n ocfs2_mount_volume fs/ocfs2/super.c:1785 [inline]\n ocfs2_fill_super+0x30a9/0x3cd0 fs/ocfs2/super.c:1083\n get_tree_bdev_flags+0x38b/0x640 fs/super.c:1698\n get_tree_bdev+0x24/0x40 fs/super.c:1721\n ocfs2_get_tree+0x21/0x30 fs/ocfs2/super.c:1184\n vfs_get_tree+0x9a/0x370 fs/super.c:1758\n fc_mount fs/namespace.c:1199 [inline]\n do_new_mount_fc fs/namespace.c:3642 [inline]\n do_new_mount fs/namespace.c:3718 [inline]\n path_mount+0x5b8/0x1ea0 fs/namespace.c:4028\n do_mount fs/namespace.c:4041 [inline]\n __do_sys_mount fs/namespace.c:4229 [inline]\n __se_sys_mount fs/namespace.c:4206 [inline]\n __x64_sys_mount+0x282/0x320 fs/namespace.c:4206\n ...\n\n[CAUSE]\nocfs2_journal_toggle_dirty() used to return -EIO when journal-\u003ej_bh no\nlonger contained a valid dinode, because the startup and shutdown paths\nalready handled that failure. Commit 10995aa2451a\n(\"ocfs2: Morph the haphazard OCFS2_IS_VALID_DINODE() checks.\") changed\nthe check to a BUG_ON() under the assumption that the journal dinode had\nalready been validated. That turns an unexpected invalid journal dinode\nduring mount teardown into a kernel crash instead of a normal mount\nfailure.\n\n[FIX]\nReplace the BUG_ON() with WARN_ON() and return -EIO. This keeps the\ninvariant warning for debugging, but restores the original behavior of\nfailing startup or shutdown cleanly instead of panicking the kernel."
        }
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        "dateUpdated": "2026-08-28T06:48:55.076Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/c0438198c28b1d22c272751af5e717c11d9fa8dd"
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      ],
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    "dateReserved": "2026-08-26T14:34:25.778Z",
    "dateUpdated": "2026-08-28T06:48:55.076Z",
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      "date": "2026-09-01",
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The mount path first reports the invalid\\njournal block and then crashes in shutdown:\\n\\nkernel BUG at fs/ocfs2/journal.c:1034!\\nOops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\\nRIP: 0010:ocfs2_journal_toggle_dirty+0x2d6/0x340 fs/ocfs2/journal.c:1034\\nCall Trace:\\n ocfs2_journal_shutdown+0x414/0xc30 fs/ocfs2/journal.c:1116\\n ocfs2_mount_volume fs/ocfs2/super.c:1785 [inline]\\n ocfs2_fill_super+0x30a9/0x3cd0 fs/ocfs2/super.c:1083\\n get_tree_bdev_flags+0x38b/0x640 fs/super.c:1698\\n get_tree_bdev+0x24/0x40 fs/super.c:1721\\n ocfs2_get_tree+0x21/0x30 fs/ocfs2/super.c:1184\\n vfs_get_tree+0x9a/0x370 fs/super.c:1758\\n fc_mount fs/namespace.c:1199 [inline]\\n do_new_mount_fc fs/namespace.c:3642 [inline]\\n do_new_mount fs/namespace.c:3718 [inline]\\n path_mount+0x5b8/0x1ea0 fs/namespace.c:4028\\n do_mount fs/namespace.c:4041 [inline]\\n __do_sys_mount fs/namespace.c:4229 [inline]\\n __se_sys_mount fs/namespace.c:4206 [inline]\\n __x64_sys_mount+0x282/0x320 fs/namespace.c:4206\\n ...\\n\\n[CAUSE]\\nocfs2_journal_toggle_dirty() used to return -EIO when journal-\u003ej_bh no\\nlonger contained a valid dinode, because the startup and shutdown paths\\nalready handled that failure. Commit 10995aa2451a\\n(\\\"ocfs2: Morph the haphazard OCFS2_IS_VALID_DINODE() checks.\\\") changed\\nthe check to a BUG_ON() under the assumption that the journal dinode had\\nalready been validated. That turns an unexpected invalid journal dinode\\nduring mount teardown into a kernel crash instead of a normal mount\\nfailure.\\n\\n[FIX]\\nReplace the BUG_ON() with WARN_ON() and return -EIO. This keeps the\\ninvariant warning for debugging, but restores the original behavior of\\nfailing startup or shutdown cleanly instead of panicking the kernel.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/ocfs2/journal.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"10995aa2451afa20b721cc7de856cae1a13dba57\",\"lessThan\":\"bf1d59cf2ac8a1730607ebaa0bc0dc6d00f197d0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"10995aa2451afa20b721cc7de856cae1a13dba57\",\"lessThan\":\"86509c5296fe46ad6bcdd83931a53c2c6b7913a8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"10995aa2451afa20b721cc7de856cae1a13dba57\",\"lessThan\":\"12c32a7350b670aaaaf2e01583d8648ec0c9755c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"10995aa2451afa20b721cc7de856cae1a13dba57\",\"lessThan\":\"b460f8d01a12061853d02c8fb693fb42450acd7d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"10995aa2451afa20b721cc7de856cae1a13dba57\",\"lessThan\":\"a06eec15596e5801bad59ad16cd2bf4f0fa839a1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"10995aa2451afa20b721cc7de856cae1a13dba57\",\"lessThan\":\"3852478d34c7baa490ba9c7374ee901a56eea577\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"10995aa2451afa20b721cc7de856cae1a13dba57\",\"lessThan\":\"5b33f99f3e48465bd93219495381a5aef4fa967f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"10995aa2451afa20b721cc7de856cae1a13dba57\",\"lessThan\":\"c0438198c28b1d22c272751af5e717c11d9fa8dd\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/ocfs2/journal.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.29\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.29\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/12c32a7350b670aaaaf2e01583d8648ec0c9755c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3852478d34c7baa490ba9c7374ee901a56eea577\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5b33f99f3e48465bd93219495381a5aef4fa967f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/86509c5296fe46ad6bcdd83931a53c2c6b7913a8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a06eec15596e5801bad59ad16cd2bf4f0fa839a1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b460f8d01a12061853d02c8fb693fb42450acd7d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bf1d59cf2ac8a1730607ebaa0bc0dc6d00f197d0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c0438198c28b1d22c272751af5e717c11d9fa8dd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-01T11:45:41+00:00",
      "cve": "CVE-2026-80644",
      "id": "CVE-2026-80644",
      "initial_release_date": "2026-08-28T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ocfs2: don\u0027t BUG_ON an invalid journal dinode",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80644.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.