CVE-2022-50755
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2022
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
udf: Avoid double brelse() in udf_rename()
In the Linux kernel, the following vulnerability has been resolved: udf: Avoid double brelse() in udf_rename() syzbot reported a warning like below [1]: VFS: brelse: Trying to free free buffer WARNING: CPU: 2 PID: 7301 at fs/buffer.c:1145 __brelse+0x67/0xa0 ... Call Trace: <TASK> invalidate_bh_lru+0x99/0x150 smp_call_function_many_cond+0xe2a/0x10c0 ? generic_remap_file_range_prep+0x50/0x50 ? __brelse+0xa0/0xa0 ? __mutex_lock+0x21c/0x12d0 ? smp_call_on_cpu+0x250/0x250 ? rcu_read_lock_sched_held+0xb/0x60 ? lock_release+0x587/0x810 ? __brelse+0xa0/0xa0 ? generic_remap_file_range_prep+0x50/0x50 on_each_cpu_cond_mask+0x3c/0x80 blkdev_flush_mapping+0x13a/0x2f0 blkdev_put_whole+0xd3/0xf0 blkdev_put+0x222/0x760 deactivate_locked_super+0x96/0x160 deactivate_super+0xda/0x100 cleanup_mnt+0x222/0x3d0 task_work_run+0x149/0x240 ? task_work_cancel+0x30/0x30 do_exit+0xb29/0x2a40 ? reacquire_held_locks+0x4a0/0x4a0 ? do_raw_spin_lock+0x12a/0x2b0 ? mm_update_next_owner+0x7c0/0x7c0 ? rwlock_bug.part.0+0x90/0x90 ? zap_other_threads+0x234/0x2d0 do_group_exit+0xd0/0x2a0 __x64_sys_exit_group+0x3a/0x50 do_syscall_64+0x34/0xb0 entry_SYSCALL_64_after_hwframe+0x63/0xcd The cause of the issue is that brelse() is called on both ofibh.sbh and ofibh.ebh by udf_find_entry() when it returns NULL. However, brelse() is called by udf_rename(), too. So, b_count on buffer_head becomes unbalanced. This patch fixes the issue by not calling brelse() by udf_rename() when udf_find_entry() returns NULL.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 231473f6ddcef9c01993e0bfe36acc6f8e425c31 | affected | git | 78eba2778ae10fb2a9d450e14d26eb6f6bf1f906 | Unavailable | None listed |
| 231473f6ddcef9c01993e0bfe36acc6f8e425c31 | affected | git | 9d2cad69547abea961fa80426d600b861de1952b | Unavailable | None listed |
| 231473f6ddcef9c01993e0bfe36acc6f8e425c31 | affected | git | d6da7ec0f94f5208c848e0e94b70f54a0bd9c587 | Unavailable | None listed |
| 231473f6ddcef9c01993e0bfe36acc6f8e425c31 | affected | git | 156d440dea97deada629bb51cb17887abd862605 | Unavailable | None listed |
| 231473f6ddcef9c01993e0bfe36acc6f8e425c31 | affected | git | 40dba68d418237b1ae2beaa06d46a94dd946278e | Unavailable | None listed |
| 231473f6ddcef9c01993e0bfe36acc6f8e425c31 | affected | git | e7a6a53c871460727be09f4414ccb29fb8697526 | Unavailable | None listed |
| 231473f6ddcef9c01993e0bfe36acc6f8e425c31 | affected | git | 4fca09045509f5bde8fc28e68fbca38cb4bdcf2e | Unavailable | None listed |
| 231473f6ddcef9c01993e0bfe36acc6f8e425c31 | affected | git | 090bf49833c51da297ec74f98ad2bf44daea9311 | Unavailable | None listed |
| 231473f6ddcef9c01993e0bfe36acc6f8e425c31 | affected | git | c791730f2554a9ebb8f18df9368dc27d4ebc38c2 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.2 | Unavailable | None listed |
| 4.9.337 | unaffected | semver | Unavailable | 4.9.* | None listed |
| 4.14.303 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.270 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.229 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.163 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.86 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.0.16 | unaffected | semver | Unavailable | 6.0.* | None listed |
| 6.1.2 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |