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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-23205

smb/client: fix memory leak in smb2_open_file()

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Status
Published
Published
Updated
Assigning organization
Linux

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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 17e53a15e64b65623b8f2b1185d27d7b1cbf69ab to < 743f70406264348c0830f38409eb6c40a42fb2dbaffected
  • 18066188eb90cc0c798f3370a8078a79ddb73f70 to < 3a6d6b332f92990958602c1e35ce0173e2dd62e9affected
  • 6ebb9d54eccc8026b386e76eff69364d33373da5 to < b64e3b5d8d759dd4333992e4ba4dadf9359952c8affected
  • e255612b5ed9f179abe8196df7c2ba09dd227900 to < 9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5affected
  • e255612b5ed9f179abe8196df7c2ba09dd227900 to < e3a43633023e3cacaca60d4b8972d084a2b06236affected
  • bcd15f06c7e8904116cfb06526bcc189b86aff85affected
  • 6.1.141 to < 6.1.163affected
  • 6.6.93 to < 6.6.124affected
  • 6.12.31 to < 6.12.70affected
  • 6.14.9 to < 6.15affected

Linux Linux

Default version status: affected

  • 6.15affected
  • 0 to < 6.15unaffected
  • 6.1.163 to ≤ 6.1.*unaffected
  • 6.6.124 to ≤ 6.6.*unaffected
  • 6.12.70 to ≤ 6.12.*unaffected
  • 6.18.10 to ≤ 6.18.*unaffected
  • 6.19 to ≤ *unaffected

References