CVE-2026-90204

ocfs2: validate DIO orphan slot during inode read

State: Published
Severity: 7.8 High
Published: Sep 17, 2026
Updated: Oct 30, 2026
Reserved: Sep 11, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	06ee5c75b57564435933fc0ffa72dc18a2fda0e7 to before b5fcd0aa818e08ede9a1d705ffadb0a19b565ebcAffected 06ee5c75b57564435933fc0ffa72dc18a2fda0e7 to before eacdd27ca829747d4372fbae8617151072a4d1e5Affected 06ee5c75b57564435933fc0ffa72dc18a2fda0e7 to before 8f7a2c5cf23d437acab7f3e739bfcad0f443c554Affected 06ee5c75b57564435933fc0ffa72dc18a2fda0e7 to before e35fa6eb4d2a39f8049f62361a4b44930882b5f8Affected 06ee5c75b57564435933fc0ffa72dc18a2fda0e7 to before 418e0ae42fa769d354b15e62c01a00413024755bAffected 06ee5c75b57564435933fc0ffa72dc18a2fda0e7 to before bb88131c9831075b8dc08cdd375743e5d44c7ca2Affected
LinuxLinux	4.0Affected before 4.0Not affected 6.1.191 through 6.1.Not affected 6.6.160 through 6.6.Not affected 6.12.114 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

06ee5c75b57564435933fc0ffa72dc18a2fda0e7 to before b5fcd0aa818e08ede9a1d705ffadb0a19b565ebcAffected
06ee5c75b57564435933fc0ffa72dc18a2fda0e7 to before eacdd27ca829747d4372fbae8617151072a4d1e5Affected
06ee5c75b57564435933fc0ffa72dc18a2fda0e7 to before 8f7a2c5cf23d437acab7f3e739bfcad0f443c554Affected
06ee5c75b57564435933fc0ffa72dc18a2fda0e7 to before e35fa6eb4d2a39f8049f62361a4b44930882b5f8Affected
06ee5c75b57564435933fc0ffa72dc18a2fda0e7 to before 418e0ae42fa769d354b15e62c01a00413024755bAffected
06ee5c75b57564435933fc0ffa72dc18a2fda0e7 to before bb88131c9831075b8dc08cdd375743e5d44c7ca2Affected

LinuxLinux

4.0Affected
before 4.0Not affected
6.1.191 through 6.1.*Not affected
6.6.160 through 6.6.*Not affected
6.12.114 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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