{"id":81019,"date":"2026-06-24T20:00:56","date_gmt":"2026-06-24T16:30:56","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-53129-fs-mbcache-cancel-shrink-work-before-destroying-the-cache\/"},"modified":"2026-06-24T20:00:56","modified_gmt":"2026-06-24T16:30:56","slug":"cve-2026-53129-fs-mbcache-cancel-shrink-work-before-destroying-the-cache","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-53129-fs-mbcache-cancel-shrink-work-before-destroying-the-cache\/","title":{"rendered":"CVE-2026-53129 &#8211; fs\/mbcache: cancel shrink work before destroying the cache"},"content":{"rendered":"<p>CVE ID :CVE-2026-53129<\/p>\n<p>  Published : June 24, 2026, 4:30 p.m. | 1\u00a0hour, 13\u00a0minutes ago<\/p>\n<p>  Description :In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>fs\/mbcache: cancel shrink work before destroying the cache<\/p>\n<p>mb_cache_destroy() calls shrinker_free() and then frees all cache<br \/>\nentries and the cache itself, but it does not cancel the pending<br \/>\nc_shrink_work work item first.<\/p>\n<p>If mb_cache_entry_create() schedules c_shrink_work via schedule_work()<br \/>\nand the work item is still pending or running when mb_cache_destroy()<br \/>\nruns, mb_cache_shrink_worker() will access the cache after its memory<br \/>\nhas been freed, causing a use-after-free.<\/p>\n<p>This is only reachable by a privileged user (root or CAP_SYS_ADMIN)<br \/>\nwho can trigger the last put of a mounted ext2\/ext4\/ocfs2 filesystem.<\/p>\n<p>Cancel the work item with cancel_work_sync() before calling<br \/>\nshrinker_free(), ensuring the worker has finished and will not be<br \/>\nrescheduled before the cache is torn down.<\/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-2026-53129 Published : June 24, 2026, 4:30 p.m. | 1\u00a0hour, 13\u00a0minutes ago Description :In the Linux kernel, the following vulnerability has been resolved: fs\/mbcache: cancel shrink work before destroying the cache mb_cache_destroy() calls shrinker_free() and then frees all cache entries and the cache itself, but it does not cancel the pending c_shrink_work work &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-81019","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/81019","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=81019"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/81019\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=81019"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=81019"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=81019"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}