{"id":"CVE-2026-23205","summary":"smb/client: fix memory leak in smb2_open_file()","details":"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","modified":"2026-04-02T13:12:13.832405Z","published":"2026-02-14T16:27:28.409Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23205.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3a6d6b332f92990958602c1e35ce0173e2dd62e9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/743f70406264348c0830f38409eb6c40a42fb2db"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b64e3b5d8d759dd4333992e4ba4dadf9359952c8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e3a43633023e3cacaca60d4b8972d084a2b06236"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23205.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23205"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"17e53a15e64b65623b8f2b1185d27d7b1cbf69ab"},{"fixed":"743f70406264348c0830f38409eb6c40a42fb2db"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"18066188eb90cc0c798f3370a8078a79ddb73f70"},{"fixed":"3a6d6b332f92990958602c1e35ce0173e2dd62e9"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6ebb9d54eccc8026b386e76eff69364d33373da5"},{"fixed":"b64e3b5d8d759dd4333992e4ba4dadf9359952c8"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e255612b5ed9f179abe8196df7c2ba09dd227900"},{"fixed":"9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5"},{"fixed":"e3a43633023e3cacaca60d4b8972d084a2b06236"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"bcd15f06c7e8904116cfb06526bcc189b86aff85"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23205.json"}}],"schema_version":"1.7.5"}