{"id":77159,"date":"2026-02-14T20:45:58","date_gmt":"2026-02-14T17:15:58","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-23205-smb-client-fix-memory-leak-in-smb2_open_file\/"},"modified":"2026-02-14T20:45:58","modified_gmt":"2026-02-14T17:15:58","slug":"cve-2026-23205-smb-client-fix-memory-leak-in-smb2_open_file","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-23205-smb-client-fix-memory-leak-in-smb2_open_file\/","title":{"rendered":"CVE-2026-23205 &#8211; smb\/client: fix memory leak in smb2_open_file()"},"content":{"rendered":"<p>CVE ID : CVE-2026-23205<\/p>\n<p>Published :  Feb. 14, 2026, 5:15 p.m. | 1\u00a0hour, 14\u00a0minutes ago<\/p>\n<p>Description : In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>smb\/client: fix memory leak in smb2_open_file()<\/p>\n<p>Reproducer:<\/p>\n<p>  1. server: directories are exported read-only<br \/>\n  2. client: mount -t cifs \/\/${server_ip}\/export \/mnt<br \/>\n  3. client: dd if=\/dev\/zero of=\/mnt\/file bs=512 count=1000 oflag=direct<br \/>\n  4. client: umount \/mnt<br \/>\n  5. client: sleep 1<br \/>\n  6. client: modprobe -r cifs<\/p>\n<p>The error message is as follows:<\/p>\n<p>  =============================================================================<br \/>\n  BUG cifs_small_rq (Not tainted): Objects remaining on __kmem_cache_shutdown()<br \/>\n  &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<\/p>\n<p>  Object 0x00000000d47521be @offset=14336<br \/>\n  &#8230;<br \/>\n  WARNING: mm\/slub.c:1251 at __kmem_cache_shutdown+0x34e\/0x440, CPU#0: modprobe\/1577<br \/>\n  &#8230;<br \/>\n  Call Trace:<\/p>\n<p>   kmem_cache_destroy+0x94\/0x190<br \/>\n   cifs_destroy_request_bufs+0x3e\/0x50 [cifs]\n   cleanup_module+0x4e\/0x540 [cifs]\n   __se_sys_delete_module+0x278\/0x400<br \/>\n   __x64_sys_delete_module+0x5f\/0x70<br \/>\n   x64_sys_call+0x2299\/0x2ff0<br \/>\n   do_syscall_64+0x89\/0x350<br \/>\n   entry_SYSCALL_64_after_hwframe+0x76\/0x7e<br \/>\n  &#8230;<br \/>\n  kmem_cache_destroy cifs_small_rq: Slab cache still has objects when called from cifs_destroy_request_bufs+0x3e\/0x50 [cifs]\n  WARNING: mm\/slab_common.c:532 at kmem_cache_destroy+0x16b\/0x190, CPU#0: modprobe\/1577<\/p>\n<p>Severity: 0.0 | NA<\/p>\n<p>Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID : CVE-2026-23205 Published : Feb. 14, 2026, 5:15 p.m. | 1\u00a0hour, 14\u00a0minutes ago Description : In the Linux kernel, the following vulnerability has been resolved: smb\/client: fix memory leak in smb2_open_file() Reproducer: 1. server: directories are exported read-only 2. client: mount -t cifs \/\/${server_ip}\/export \/mnt 3. client: dd if=\/dev\/zero of=\/mnt\/file bs=512 count=1000 oflag=direct &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-77159","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/77159","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=77159"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/77159\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=77159"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=77159"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=77159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}