Answer in brief
CVE-2022-50755 records a High severity (CVSS 7.8) vulnerability in udf: Avoid double brelse() in udf_rename(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=231473f6ddcef9c01993e0bfe36acc6f8e425c31 <78eba2778ae10fb2a9d450e14d26eb6f6bf1f906 || >=231473f6ddcef9c01993e0bfe36acc6f8e425c31 <9d2cad69547abea961fa80426d600b861de1952b || >=231473f6ddcef9c01993e0bfe36acc6f8e425c31 <d6da7ec0f94f5208c848e0e94b70f54a0bd9c587 || >=231473f6ddcef9c01993e0bfe36acc6f8e425c31 <156d440dea97deada629bb51cb17887abd862605 || >=231473f6ddcef9c01993e0bfe36acc6f8e425c31 <40dba68d418237b1ae2beaa06d46a94dd946278e || >=231473f6ddcef9c01993e0bfe36acc6f8e425c31 <e7a6a53c871460727be09f4414ccb29fb8697526 || >=231473f6ddcef9c01993e0bfe36acc6f8e425c31 <4fca09045509f5bde8fc28e68fbca38cb4bdcf2e || >=231473f6ddcef9c01993e0bfe36acc6f8e425c31 <090bf49833c51da297ec74f98ad2bf44daea9311 || >=231473f6ddcef9c01993e0bfe36acc6f8e425c31 <c791730f2554a9ebb8f18df9368dc27d4ebc38c2 | 78eba2778ae10fb2a9d450e14d26eb6f6bf1f906, 9d2cad69547abea961fa80426d600b861de1952b, d6da7ec0f94f5208c848e0e94b70f54a0bd9c587, 156d440dea97deada629bb51cb17887abd862605, 40dba68d418237b1ae2beaa06d46a94dd946278e, e7a6a53c871460727be09f4414ccb29fb8697526, 4fca09045509f5bde8fc28e68fbca38cb4bdcf2e, 090bf49833c51da297ec74f98ad2bf44daea9311, c791730f2554a9ebb8f18df9368dc27d4ebc38c2 |
| Linux/Linuxgeneric | 4.2 | Not reported |
Published upstream
Dec 24, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.