CVE-2026-90205ocfs2: validate orphan slot during inode read
- 7.8HighCVSS base score
- 0.18%Exploitation in 30 daysEPSS · top 92% 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: validate orphan slot during inode read Patch series "ocfs2: validate active orphan slots during inode read". OCFS2 trusts active ordinary and append-DIO orphan slots read from dinodes. A corrupted slot can therefore index osb_orphan_wipes or the slot-local system-inode cache outside their allocations before the corruption is reported. Patch 1 validates the ordinary orphan slot used by inode wipe processing. Patch 2 validates the append-DIO orphan slot used by DIO completion and orphan recovery. Both checks reject corrupt metadata at the existing inode validation boundary. This patch (of 2): [BUG] A corrupted dinode with OCFS2_ORPHANED_FL can carry an i_orphaned_slot outside the mounted filesystem slot range. ocfs2_wipe_inode() uses it to index osb_orphan_wipes before looking up the orphan directory, causing an out-of-bounds memory access. BUG: KASAN: slab-use-after-free in ocfs2_get_system_file_inode+0x780/0x820 fs/ocfs2/sysfile.c:102 Read of size 8 at addr ffff88800b767c00 by task kworker/u8:3/85 Call Trace: ... ocfs2_get_system_file_inode+0x780/0x820 fs/ocfs2/sysfile.c:102 ocfs2_wipe_inode+0x292/0xf70 fs/ocfs2/inode.c:840 ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline] ocfs2_evict_inode+0x6c9/0x1170 fs/ocfs2/inode.c:1295 evict+0x38e/0x8f0 fs/inode.c:810 iput_final fs/inode.c:1914 [inline] iput fs/inode.c:1966 [inline] iput+0x55b/0x8b0 fs/inode.c:1926 ocfs2_recover_orphans+0x610/0xe40 fs/ocfs2/journal.c:2374 ocfs2_complete_recovery+0x5af/0xd00 fs/ocfs2/journal.c:1373 ... [CAUSE] ocfs2_validate_inode_block() validates i_suballoc_slot but leaves the active ordinary orphan slot unchecked. Downstream consumers assume that the value is smaller than osb->max_slots. [FIX] Reject an active i_orphaned_slot outside the slot range during dinode validation, before the inode reaches orphan wipe processing.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 43 days later
· 43 days 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.18% · top 92% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected b4df6ed8db0c387d38292e31f00adc4cd297ed5a – < edd76be702c0f8702472888425237fb9219e1c43
- affected b4df6ed8db0c387d38292e31f00adc4cd297ed5a – < f535a34831f8325950933b401c76bfa99624419c
- affected b4df6ed8db0c387d38292e31f00adc4cd297ed5a – < dea50e8049b0db2eb3d468e2505034962e81d8cd
- affected b4df6ed8db0c387d38292e31f00adc4cd297ed5a – < c6c908f9b4edfb04534b15573168ae038f7a9cbf
- affected b4df6ed8db0c387d38292e31f00adc4cd297ed5a – < 3d7c4b7ce7b4baedfd8699fa692cd95f77d332de
- affected b4df6ed8db0c387d38292e31f00adc4cd297ed5a – < b2d31acbd3b182755b019183fb46949ba5e39b9f
- affected 2.6.16
- unaffected < 2.6.16
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/edd76be702c0f8702472888425237fb9219e1c43 (opens in a new tab)
- https://git.kernel.org/stable/c/f535a34831f8325950933b401c76bfa99624419c (opens in a new tab)
- https://git.kernel.org/stable/c/dea50e8049b0db2eb3d468e2505034962e81d8cd (opens in a new tab)
- https://git.kernel.org/stable/c/c6c908f9b4edfb04534b15573168ae038f7a9cbf (opens in a new tab)
- https://git.kernel.org/stable/c/3d7c4b7ce7b4baedfd8699fa692cd95f77d332de (opens in a new tab)
- https://git.kernel.org/stable/c/b2d31acbd3b182755b019183fb46949ba5e39b9f (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-2026-81798 (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)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-90205)Record last updated .