CVE-2026-31598
7.5 HIGHIn the Linux kernel, the following vulnerability has been resolved: ocfs2: fix possible deadlock between unlink and dio_end_io_write oc...
Published: 2026-04-24 · Last updated: 2026-06-01
Severity and scoring
- CVSS
- 7.5 HIGH
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CWE
- CWE-667
Affected products
| Vendor | Product |
|---|---|
| linux | linux_kernel |
Description
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix possible deadlock between unlink and dio_end_io_write ocfs2_unlink takes orphan dir inode_lock first and then ip_alloc_sem, while in ocfs2_dio_end_io_write, it acquires these locks in reverse order. This creates an ABBA lock ordering violation on lock classes ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE] and ocfs2_file_ip_alloc_sem_key. Lock Chain #0 (orphan dir inode_lock -> ip_alloc_sem): ocfs2_unlink ocfs2_prepare_orphan_dir ocfs2_lookup_lock_orphan_dir inode_lock(orphan_dir_inode) <- lock A __ocfs2_prepare_orphan_dir ocfs2_prepare_dir_for_insert ocfs2_extend_dir ocfs2_expand_inline_dir down_write(&oi->ip_alloc_sem) <- Lock B Lock Chain #1 (ip_alloc_sem -> orphan dir inode_lock): ocfs2_dio_end_io_write down_write(&oi->ip_alloc_sem) <- Lock B ocfs2_del_inode_from_orphan() inode_lock(orphan_dir_inode) <- Lock A Deadlock Scenario: CPU0 (unlink) CPU1 (dio_end_io_write) ------ ------ inode_lock(orphan_dir_inode) down_write(ip_alloc_sem) down_write(ip_alloc_sem) inode_lock(orphan_dir_inode) Since ip_alloc_sem is to protect allocation changes, which is unrelated with operations in ocfs2_del_inode_from_orphan. So move ocfs2_del_inode_from_orphan out of ip_alloc_sem to fix the deadlock.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-31598
- [Other]https://git.kernel.org/stable/c/297d8d7bb6a2bf133d3a3636edbdf94101cbd719
- [Patch]https://git.kernel.org/stable/c/2b884d52273c60c298bd570163e8053657bbaff6
- [Other]https://git.kernel.org/stable/c/32630dee18c6bb2175c8a865a474749492eaf19c
- [Patch]https://git.kernel.org/stable/c/4b80b5a838a32437f2cae0662578bac216a2c51a
- [Other]https://git.kernel.org/stable/c/93f35419eb84d58820040642cb6e7528fe4aba7a
- [Patch]https://git.kernel.org/stable/c/b02da26a992db0c0e2559acbda0fc48d4a2fd337
- [Patch]https://git.kernel.org/stable/c/bc0fb5c7d54c78be43a536df0e20dee32adb27d3
- [Patch]https://git.kernel.org/stable/c/e049f7a9bd80b7319590789ea5e1c523d6339d91
- [Patch]https://git.kernel.org/stable/c/f9fb1a7b635849322e1d7b7b6b26389778ec8e82
Related CVEs
Same vendor
- CVE-2026-46273 — In the Linux kernel, the following vulnerability has been resolved: ibmveth: Disable GSO for packets with small MSS Some physical adapt... (8.6 HIGH)
- CVE-2026-46272 — In the Linux kernel, the following vulnerability has been resolved: coresight: tmc-etr: Fix race condition between sysfs and perf mode ... (4.7 MEDIUM)
- CVE-2026-46271 — In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: do WoW offloads only on primary link In case of multi... (7.8 HIGH)
- CVE-2026-46270 — In the Linux kernel, the following vulnerability has been resolved: power: supply: rt9455: Fix use-after-free in power_supply_changed() ... (8.4 HIGH)
- CVE-2026-46269 — In the Linux kernel, the following vulnerability has been resolved: pinctrl: canaan: k230: Fix NULL pointer dereference when parsing dev... (5.5 MEDIUM)
Same CWE
- CVE-2026-46262 — In the Linux kernel, the following vulnerability has been resolved: ASoC: fsl_xcvr: Revert fix missing lock in fsl_xcvr_mode_put() This... (5.5 MEDIUM)
- CVE-2026-46256 — In the Linux kernel, the following vulnerability has been resolved: NFS/localio: prevent direct reclaim recursion into NFS via nfs_write... (5.5 MEDIUM)
- CVE-2026-46252 — In the Linux kernel, the following vulnerability has been resolved: regulator: core: fix locking in regulator_resolve_supply() error pat... (5.5 MEDIUM)
- CVE-2026-46223 — In the Linux kernel, the following vulnerability has been resolved: cgroup: Defer css percpu_ref kill on rmdir until cgroup is depopulat... (5.5 MEDIUM)
- CVE-2026-46165 — In the Linux kernel, the following vulnerability has been resolved: openvswitch: vport: fix self-deadlock on release of tunnel ports vp... (5.5 MEDIUM)