CVE-2026-23205

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-23205
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

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/3a6d6b332f92990958602c1e35ce0173e2dd62e9 Patch
https://git.kernel.org/stable/c/743f70406264348c0830f38409eb6c40a42fb2db Patch
https://git.kernel.org/stable/c/9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 Patch
https://git.kernel.org/stable/c/b64e3b5d8d759dd4333992e4ba4dadf9359952c8 Patch
https://git.kernel.org/stable/c/e3a43633023e3cacaca60d4b8972d084a2b06236 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*
History

18 Mar 2026, 17:10

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/3a6d6b332f92990958602c1e35ce0173e2dd62e9 - () https://git.kernel.org/stable/c/3a6d6b332f92990958602c1e35ce0173e2dd62e9 - Patch
References () https://git.kernel.org/stable/c/743f70406264348c0830f38409eb6c40a42fb2db - () https://git.kernel.org/stable/c/743f70406264348c0830f38409eb6c40a42fb2db - Patch
References () https://git.kernel.org/stable/c/9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 - () https://git.kernel.org/stable/c/9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 - Patch
References () https://git.kernel.org/stable/c/b64e3b5d8d759dd4333992e4ba4dadf9359952c8 - () https://git.kernel.org/stable/c/b64e3b5d8d759dd4333992e4ba4dadf9359952c8 - Patch
References () https://git.kernel.org/stable/c/e3a43633023e3cacaca60d4b8972d084a2b06236 - () https://git.kernel.org/stable/c/e3a43633023e3cacaca60d4b8972d084a2b06236 - Patch
CPE cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*
CWE CWE-401
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

18 Feb 2026, 17:52

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: smb/cliente: corrige una fuga de memoria en smb2_open_file() Reproductor: 1. servidor: los directorios se exportan de solo lectura 2. cliente: mount -t cifs //${server_ip}/export /mnt 3. cliente: dd if=/dev/zero of=/mnt/file bs=512 count=1000 oflag=direct 4. cliente: umount /mnt 5. cliente: sleep 1 6. cliente: modprobe -r cifs El mensaje de error es el siguiente: ============================================================================= BUG cifs_small_rq (No contaminado): Objetos restantes en __kmem_cache_shutdown() ----------------------------------------------------------------------------- Object 0x00000000d47521be @offset=14336 ... ADVERTENCIA: mm/slub.c:1251 en __kmem_cache_shutdown+0x34e/0x440, CPU#0: modprobe/1577 ... Traza de Llamada: 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: La caché de slab aún tiene objetos cuando se llama desde cifs_destroy_request_bufs+0x3e/0x50 [cifs] ADVERTENCIA: mm/slab_common.c:532 en kmem_cache_destroy+0x16b/0x190, CPU#0: modprobe/1577

14 Feb 2026, 17:15

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-14 17:15

Updated : 2026-03-18 17:10

NVD link : CVE-2026-23205

Mitre link : CVE-2026-23205

CVE.ORG link : CVE-2026-23205

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime