CVE-2026-80644ocfs2: don't BUG_ON an invalid journal dinode
- —Not scoredno CVSS score yet
- 0.22%Exploitation in 30 daysEPSS · top 87% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 2 days later
· 2 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.22% · top 87% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 10995aa2451afa20b721cc7de856cae1a13dba57 – < bf1d59cf2ac8a1730607ebaa0bc0dc6d00f197d0
- affected 10995aa2451afa20b721cc7de856cae1a13dba57 – < 86509c5296fe46ad6bcdd83931a53c2c6b7913a8
- affected 10995aa2451afa20b721cc7de856cae1a13dba57 – < 12c32a7350b670aaaaf2e01583d8648ec0c9755c
- affected 10995aa2451afa20b721cc7de856cae1a13dba57 – < b460f8d01a12061853d02c8fb693fb42450acd7d
- affected 10995aa2451afa20b721cc7de856cae1a13dba57 – < a06eec15596e5801bad59ad16cd2bf4f0fa839a1
- affected 10995aa2451afa20b721cc7de856cae1a13dba57 – < 3852478d34c7baa490ba9c7374ee901a56eea577
- affected 10995aa2451afa20b721cc7de856cae1a13dba57 – < 5b33f99f3e48465bd93219495381a5aef4fa967f
- affected 10995aa2451afa20b721cc7de856cae1a13dba57 – < c0438198c28b1d22c272751af5e717c11d9fa8dd
- affected 2.6.29
- unaffected < 2.6.29
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/bf1d59cf2ac8a1730607ebaa0bc0dc6d00f197d0 (opens in a new tab)
- https://git.kernel.org/stable/c/86509c5296fe46ad6bcdd83931a53c2c6b7913a8 (opens in a new tab)
- https://git.kernel.org/stable/c/12c32a7350b670aaaaf2e01583d8648ec0c9755c (opens in a new tab)
- https://git.kernel.org/stable/c/b460f8d01a12061853d02c8fb693fb42450acd7d (opens in a new tab)
- https://git.kernel.org/stable/c/a06eec15596e5801bad59ad16cd2bf4f0fa839a1 (opens in a new tab)
- https://git.kernel.org/stable/c/3852478d34c7baa490ba9c7374ee901a56eea577 (opens in a new tab)
- https://git.kernel.org/stable/c/5b33f99f3e48465bd93219495381a5aef4fa967f (opens in a new tab)
- https://git.kernel.org/stable/c/c0438198c28b1d22c272751af5e717c11d9fa8dd (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-67520 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-80644)Record last updated .