CVE-2026-43106

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> cachefiles: fix incorrect dentry refcount in cachefiles_cull()<br /> <br /> The patch mentioned below changed cachefiles_bury_object() to expect 2<br /> references to the &amp;#39;rep&amp;#39; dentry. Three of the callers were changed to<br /> use start_removing_dentry() which takes an extra reference so in those<br /> cases the call gets the expected references.<br /> <br /> However there is another call to cachefiles_bury_object() in<br /> cachefiles_cull() which did not need to be changed to use<br /> start_removing_dentry() and so was not properly considered.<br /> It still passed the dentry with just one reference so the net result is<br /> that a reference is lost.<br /> <br /> To meet the expectations of cachefiles_bury_object(), cachefiles_cull()<br /> must take an extra reference before the call. It will be dropped by<br /> cachefiles_bury_object().