CVE-2026-23205 (GCVE-0-2026-23205)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-02-14 16:27
VLAI?
Title
smb/client: fix memory leak in smb2_open_file()
Summary
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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 17e53a15e64b65623b8f2b1185d27d7b1cbf69ab , < 743f70406264348c0830f38409eb6c40a42fb2db (git)
Affected: 18066188eb90cc0c798f3370a8078a79ddb73f70 , < 3a6d6b332f92990958602c1e35ce0173e2dd62e9 (git)
Affected: 6ebb9d54eccc8026b386e76eff69364d33373da5 , < b64e3b5d8d759dd4333992e4ba4dadf9359952c8 (git)
Affected: e255612b5ed9f179abe8196df7c2ba09dd227900 , < 9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 (git)
Affected: e255612b5ed9f179abe8196df7c2ba09dd227900 , < e3a43633023e3cacaca60d4b8972d084a2b06236 (git)
Affected: bcd15f06c7e8904116cfb06526bcc189b86aff85 (git)
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    Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.1.163 , ≤ 6.1.* (semver)
Unaffected: 6.6.124 , ≤ 6.6.* (semver)
Unaffected: 6.12.70 , ≤ 6.12.* (semver)
Unaffected: 6.18.10 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2file.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: fix memory leak in smb2_open_file()\n\nReproducer:\n\n  1. server: directories are exported read-only\n  2. client: mount -t cifs //${server_ip}/export /mnt\n  3. client: dd if=/dev/zero of=/mnt/file bs=512 count=1000 oflag=direct\n  4. client: umount /mnt\n  5. client: sleep 1\n  6. client: modprobe -r cifs\n\nThe error message is as follows:\n\n  =============================================================================\n  BUG cifs_small_rq (Not tainted): Objects remaining on __kmem_cache_shutdown()\n  -----------------------------------------------------------------------------\n\n  Object 0x00000000d47521be @offset=14336\n  ...\n  WARNING: mm/slub.c:1251 at __kmem_cache_shutdown+0x34e/0x440, CPU#0: modprobe/1577\n  ...\n  Call Trace:\n   \u003cTASK\u003e\n   kmem_cache_destroy+0x94/0x190\n   cifs_destroy_request_bufs+0x3e/0x50 [cifs]\n   cleanup_module+0x4e/0x540 [cifs]\n   __se_sys_delete_module+0x278/0x400\n   __x64_sys_delete_module+0x5f/0x70\n   x64_sys_call+0x2299/0x2ff0\n   do_syscall_64+0x89/0x350\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n  ...\n  kmem_cache_destroy cifs_small_rq: Slab cache still has objects when called from cifs_destroy_request_bufs+0x3e/0x50 [cifs]\n  WARNING: mm/slab_common.c:532 at kmem_cache_destroy+0x16b/0x190, CPU#0: modprobe/1577"
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      "providerMetadata": {
        "dateUpdated": "2026-02-14T16:27:28.409Z",
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        "shortName": "Linux"
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    "datePublished": "2026-02-14T16:27:28.409Z",
    "dateReserved": "2026-01-13T15:37:45.986Z",
    "dateUpdated": "2026-02-14T16:27:28.409Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23205\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-14T17:15:58.403\",\"lastModified\":\"2026-02-14T17:15:58.403\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsmb/client: fix memory leak in smb2_open_file()\\n\\nReproducer:\\n\\n  1. server: directories are exported read-only\\n  2. client: mount -t cifs //${server_ip}/export /mnt\\n  3. client: dd if=/dev/zero of=/mnt/file bs=512 count=1000 oflag=direct\\n  4. client: umount /mnt\\n  5. client: sleep 1\\n  6. client: modprobe -r cifs\\n\\nThe error message is as follows:\\n\\n  =============================================================================\\n  BUG cifs_small_rq (Not tainted): Objects remaining on __kmem_cache_shutdown()\\n  -----------------------------------------------------------------------------\\n\\n  Object 0x00000000d47521be @offset=14336\\n  ...\\n  WARNING: mm/slub.c:1251 at __kmem_cache_shutdown+0x34e/0x440, CPU#0: modprobe/1577\\n  ...\\n  Call Trace:\\n   \u003cTASK\u003e\\n   kmem_cache_destroy+0x94/0x190\\n   cifs_destroy_request_bufs+0x3e/0x50 [cifs]\\n   cleanup_module+0x4e/0x540 [cifs]\\n   __se_sys_delete_module+0x278/0x400\\n   __x64_sys_delete_module+0x5f/0x70\\n   x64_sys_call+0x2299/0x2ff0\\n   do_syscall_64+0x89/0x350\\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n  ...\\n  kmem_cache_destroy cifs_small_rq: Slab cache still has objects when called from cifs_destroy_request_bufs+0x3e/0x50 [cifs]\\n  WARNING: mm/slab_common.c:532 at kmem_cache_destroy+0x16b/0x190, CPU#0: modprobe/1577\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3a6d6b332f92990958602c1e35ce0173e2dd62e9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/743f70406264348c0830f38409eb6c40a42fb2db\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b64e3b5d8d759dd4333992e4ba4dadf9359952c8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e3a43633023e3cacaca60d4b8972d084a2b06236\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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