CVE-2022-49281 (GCVE-0-2022-49281)
Vulnerability from cvelistv5
Published
2025-02-26 01:56
Modified
2025-05-04 08:34
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/cifs/cifsfs.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "2fafbc198613823943c106d1ec9b516da692059f",
"status": "affected",
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"versionType": "git"
},
{
"lessThan": "ffa631c4bff59dde59b598011f570e27dfba3515",
"status": "affected",
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"versionType": "git"
},
{
"lessThan": "e71f6a3a1d5c826a30384fec587ca7503ef6bde5",
"status": "affected",
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"versionType": "git"
},
{
"lessThan": "47178c7722ac528ea08aa82c3ef9ffa178962d7a",
"status": "affected",
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/cifs/cifsfs.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.33",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.16.*",
"status": "unaffected",
"version": "5.16.19",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.17.*",
"status": "unaffected",
"version": "5.17.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.33",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.16.19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.17.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.18",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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"
}
],
"providerMetadata": {
"dateUpdated": "2025-05-04T08:34:05.720Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/2fafbc198613823943c106d1ec9b516da692059f"
},
{
"url": "https://git.kernel.org/stable/c/ffa631c4bff59dde59b598011f570e27dfba3515"
},
{
"url": "https://git.kernel.org/stable/c/e71f6a3a1d5c826a30384fec587ca7503ef6bde5"
},
{
"url": "https://git.kernel.org/stable/c/47178c7722ac528ea08aa82c3ef9ffa178962d7a"
}
],
"title": "cifs: fix handlecache and multiuser",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-49281",
"datePublished": "2025-02-26T01:56:23.201Z",
"dateReserved": "2025-02-26T01:49:39.298Z",
"dateUpdated": "2025-05-04T08:34:05.720Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}