CVE-2026-90204High· 7.8▾ Twilight

In the Linux kernel, the following vulnerability has been resolved: ocfs2: validate DIO orphan slot during inode read [BUG] A corrupted append-DIO dinode (high byte at offset 0xa1 corrupted from 0 to 1) can carry an i_dio_orphaned_slot…

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score43/ 100 · Moderate

impact 42.9 · likelihood 0 · exploitation 0

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Proof of concept

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Published

Sep 17, 2026

Updated

Sep 18, 2026

CVSS

7.8

Vendor

Linux

Product

Linux

CWE

—

Depth score

43 · Moderate

EPSS

0.18% · p8

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS history

Exploit-prediction probability, daily snapshots since Sep 18.

0.2% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

5 events · 2 days

Sep 17, 2026Published
Disclosed via NVD
Sep 18, 2026Record revised
Last analysed / modified upstream
Sep 18, 2026EPSS first tracked
0.2%
Sep 18, 2026CVSS changed
— → 7.8
Sep 18, 2026Severity changed
none → high

Linux #nvd #cve.org

Affected

Linux >= 06ee5c75b57564435933fc0ffa72dc18a2fda0e7 < e35fa6eb4d2a39f8049f62361a4b44930882b5f8
Linux >= 06ee5c75b57564435933fc0ffa72dc18a2fda0e7 < 418e0ae42fa769d354b15e62c01a00413024755b
Linux >= 06ee5c75b57564435933fc0ffa72dc18a2fda0e7 < bb88131c9831075b8dc08cdd375743e5d44c7ca2
Linux 4.0

Full technical detail▾

Overview

In the Linux kernel, the following vulnerability has been resolved:

ocfs2: validate DIO orphan slot during inode read

[BUG] A corrupted append-DIO dinode (high byte at offset 0xa1 corrupted from 0 to 1) can carry an i_dio_orphaned_slot outside the mounted filesystem slot range and trigger a use-after-free error:

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_del_inode_from_orphan() uses i_dio_orphaned_slot to index the slot-local system inode cache. The dinode validator does not check this active slot, so an out-of-range value produces an invalid cache entry pointer that is dereferenced as an inode pointer.

[FIX] Reject an active i_dio_orphaned_slot outside the slot range during dinode validation, before DIO orphan recovery can consume it.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Change history

Field changes observed since this record was first indexed.

Sep 18, 2026CVSS — → 7.8
Sep 18, 2026Severity none → high

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org