{"id":"CVE-2022-49281","url":"https://www.cyber-defence.io/tools/cve/CVE-2022-49281","generatedAt":"2026-10-27T19:39:50.179Z","title":"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.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix handlecache and multiuser\n\nIn multiuser each individual user has their own tcon structure for the\nshare and thus their own handle for a cached directory.\nWhen we umount such a share we much make sure to release the pinned down dentry\nfor each such tcon and not just the master tcon.\n\nOtherwise we will get nasty warnings on umount that dentries are still in use:\n[ 3459.590047] BUG: Dentry 00000000115c6f41{i=12000000019d95,n=/}  still in use\\\n (2) [unmount of cifs cifs]\n...\n[ 3459.590492] Call Trace:\n[ 3459.590500]  d_walk+0x61/0x2a0\n[ 3459.590518]  ? shrink_lock_dentry.part.0+0xe0/0xe0\n[ 3459.590526]  shrink_dcache_for_umount+0x49/0x110\n[ 3459.590535]  generic_shutdown_super+0x1a/0x110\n[ 3459.590542]  kill_anon_super+0x14/0x30\n[ 3459.590549]  cifs_kill_sb+0xf5/0x104 [cifs]\n[ 3459.590773]  deactivate_locked_super+0x36/0xa0\n[ 3459.590782]  cleanup_mnt+0x131/0x190\n[ 3459.590789]  task_work_run+0x5c/0x90\n[ 3459.590798]  exit_to_user_mode_loop+0x151/0x160\n[ 3459.590809]  exit_to_user_mode_prepare+0x83/0xd0\n[ 3459.590818]  syscall_exit_to_user_mode+0x12/0x30\n[ 3459.590828]  do_syscall_64+0x48/0x90\n[ 3459.590833]  entry_SYSCALL_64_after_hwframe+0x44/0xae","published":"2025-02-26T07:01:05.000Z","lastModified":"2026-06-17T05:17:35.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":[],"affected":["linux/linux kernel"],"epss":{"score":0.00268,"percentile":0.18824,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/2fafbc198613823943c106d1ec9b516da692059f","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/47178c7722ac528ea08aa82c3ef9ffa178962d7a","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e71f6a3a1d5c826a30384fec587ca7503ef6bde5","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ffa631c4bff59dde59b598011f570e27dfba3515","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-49281","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}