In the Linux kernel, the following vulnerability has been resolved:

smb/client: fix memory leak in smb2_open_file()

Reproducer:

1. server: directories are exported read-only
2. client: mount -t cifs //${server_ip}/export /mnt
3. client: dd if=/dev/zero of=/mnt/file bs=512 count=1000 oflag=direct
4. client: umount /mnt
5. client: sleep 1
6. client: modprobe -r cifs

The error message is as follows:

=============================================================================
BUG cifs_small_rq (Not tainted): Objects remaining on __kmem_cache_shutdown()
-----------------------------------------------------------------------------

Object 0x00000000d47521be @offset=14336
...
WARNING: mm/slub.c:1251 at __kmem_cache_shutdown+0x34e/0x440, CPU#0: modprobe/1577
...
Call Trace:
<TASK>
kmem_cache_destroy+0x94/0x190
cifs_destroy_request_bufs+0x3e/0x50 [cifs]
cleanup_module+0x4e/0x540 [cifs]
__se_sys_delete_module+0x278/0x400
__x64_sys_delete_module+0x5f/0x70
x64_sys_call+0x2299/0x2ff0
do_syscall_64+0x89/0x350
entry_SYSCALL_64_after_hwframe+0x76/0x7e
...
kmem_cache_destroy cifs_small_rq: Slab cache still has objects when called from cifs_destroy_request_bufs+0x3e/0x50 [cifs]
WARNING: mm/slab_common.c:532 at kmem_cache_destroy+0x16b/0x190, CPU#0: modprobe/1577

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
17e53a15e64b65623b8f2b1185d27d7b1cbf69ab affected < 743f70406264348c0830f38409eb6c40a42fb2db
18066188eb90cc0c798f3370a8078a79ddb73f70 affected < 3a6d6b332f92990958602c1e35ce0173e2dd62e9
6ebb9d54eccc8026b386e76eff69364d33373da5 affected < b64e3b5d8d759dd4333992e4ba4dadf9359952c8
e255612b5ed9f179abe8196df7c2ba09dd227900 affected < 9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5
e255612b5ed9f179abe8196df7c2ba09dd227900 affected < e3a43633023e3cacaca60d4b8972d084a2b06236
bcd15f06c7e8904116cfb06526bcc189b86aff85 affected —
Linux Linux affected
Version Status Constraints
6.15 affected —
0 unaffected < 6.15
6.1.163 unaffected ≤ 6.1.*
6.6.124 unaffected ≤ 6.6.*
6.12.70 unaffected ≤ 6.12.*
6.18.10 unaffected ≤ 6.18.*
6.19 unaffected ≤ *

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References
Link Providers
https://git.kernel.org/stable/c/3a6d6b332f92990958602c1e35ce0173e2dd62e9 cve-icon cve-icon
https://git.kernel.org/stable/c/743f70406264348c0830f38409eb6c40a42fb2db cve-icon cve-icon
https://git.kernel.org/stable/c/9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 cve-icon cve-icon
https://git.kernel.org/stable/c/b64e3b5d8d759dd4333992e4ba4dadf9359952c8 cve-icon cve-icon
https://git.kernel.org/stable/c/e3a43633023e3cacaca60d4b8972d084a2b06236 cve-icon cve-icon
History

Sat, 14 Feb 2026 16:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: smb/client: fix memory leak in smb2_open_file() Reproducer: 1. server: directories are exported read-only 2. client: mount -t cifs //${server_ip}/export /mnt 3. client: dd if=/dev/zero of=/mnt/file bs=512 count=1000 oflag=direct 4. client: umount /mnt 5. client: sleep 1 6. client: modprobe -r cifs The error message is as follows: ============================================================================= BUG cifs_small_rq (Not tainted): Objects remaining on __kmem_cache_shutdown() ----------------------------------------------------------------------------- Object 0x00000000d47521be @offset=14336 ... WARNING: mm/slub.c:1251 at __kmem_cache_shutdown+0x34e/0x440, CPU#0: modprobe/1577 ... Call Trace: <TASK> kmem_cache_destroy+0x94/0x190 cifs_destroy_request_bufs+0x3e/0x50 [cifs] cleanup_module+0x4e/0x540 [cifs] __se_sys_delete_module+0x278/0x400 __x64_sys_delete_module+0x5f/0x70 x64_sys_call+0x2299/0x2ff0 do_syscall_64+0x89/0x350 entry_SYSCALL_64_after_hwframe+0x76/0x7e ... kmem_cache_destroy cifs_small_rq: Slab cache still has objects when called from cifs_destroy_request_bufs+0x3e/0x50 [cifs] WARNING: mm/slab_common.c:532 at kmem_cache_destroy+0x16b/0x190, CPU#0: modprobe/1577
Title smb/client: fix memory leak in smb2_open_file()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-02-14T16:27:28.409Z

Reserved: 2026-01-13T15:37:45.986Z

Link: CVE-2026-23205

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-02-14T17:15:58.403

Modified: 2026-02-14T17:15:58.403

Link: CVE-2026-23205

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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