CVE-2022-49281

Advisory lineage Upstream: 0 Downstream: 11
Analyzed
Published: 26 Feb 2025, 01:56
Last modified:11 May 2026, 18:56

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

26 Feb 2025, 01:56
Published
Vulnerability first disclosed
11 May 2026, 18:56
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: fix handlecache and multiuser In multiuser each individual user has their own tcon structure for the share and thus their own handle for a cached directory. When we umount such a share we much make sure to release the pinned down dentry for each such tcon and not just the master tcon. Otherwise we will get nasty warnings on umount that dentries are still in use: [ 3459.590047] BUG: Dentry 00000000115c6f41{i=12000000019d95,n=/} still in use\ (2) [unmount of cifs cifs] ... [ 3459.590492] Call Trace: [ 3459.590500] d_walk+0x61/0x2a0 [ 3459.590518] ? shrink_lock_dentry.part.0+0xe0/0xe0 [ 3459.590526] shrink_dcache_for_umount+0x49/0x110 [ 3459.590535] generic_shutdown_super+0x1a/0x110 [ 3459.590542] kill_anon_super+0x14/0x30 [ 3459.590549] cifs_kill_sb+0xf5/0x104 [cifs] [ 3459.590773] deactivate_locked_super+0x36/0xa0 [ 3459.590782] cleanup_mnt+0x131/0x190 [ 3459.590789] task_work_run+0x5c/0x90 [ 3459.590798] exit_to_user_mode_loop+0x151/0x160 [ 3459.590809] exit_to_user_mode_prepare+0x83/0xd0 [ 3459.590818] syscall_exit_to_user_mode+0x12/0x30 [ 3459.590828] do_syscall_64+0x48/0x90 [ 3459.590833] entry_SYSCALL_64_after_hwframe+0x44/0xae

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Affected Systems

  • linux•linux

    ≥ 5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9, < 2fafbc198613823943c106d1ec9b516da692059f | ≥ 5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9, < ffa631c4bff59dde59b598011f570e27dfba3515 | ≥ 5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9, < e71f6a3a1d5c826a30384fec587ca7503ef6bde5 | ≥ 5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9, < 47178c7722ac528ea08aa82c3ef9ffa178962d7a | 5.13

  • linux•linux_kernel

    < 5.15.33 | ≥ 5.16, < 5.16.19 | ≥ 5.17, < 5.17.2

References (4)