https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 29 Sep 2026 13:03:34 +0000 https://vulnerability.circl.lu/vuln/cve-2026-93795 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>blk-cgroup: fix leaks and online flag on radix_tree_insert failure</p> <p>When radix_tree_insert() fails in blkg_create(), the error path has two issues:</p> <p>1. blkg-&gt;online is set to true unconditionally, even when the blkg was never fully inserted. Move the assignment inside the success block.</p> <p>2. The error path calls blkg_put() without first calling percpu_ref_kill(). Because the refcount is still in percpu mode, percpu_ref_put() only does this_cpu_sub() without checking for zero, so blkg_release() is never triggered. This permanently leaks the blkg memory, its percpu iostat, policy data, the parent blkg reference, and the cgroup css reference — the latter preventing the cgroup from ever being destroyed.</p> <p>Fix by replacing blkg_put() with percpu_ref_kill(), matching the pattern used in blkg_destroy().</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>blk-cgroup: fix leaks and online flag on radix_tree_insert failure</p> <p>When radix_tree_insert() fails in blkg_create(), the error path has two issues:</p> <p>1. blkg-&gt;online is set to true unconditionally, even when the blkg was never fully inserted. Move the assignment inside the success block.</p> <p>2. The error path calls blkg_put() without first calling percpu_ref_kill(). Because the refcount is still in percpu mode, percpu_ref_put() only does this_cpu_sub() without checking for zero, so blkg_release() is never triggered. This permanently leaks the blkg memory, its percpu iostat, policy data, the parent blkg reference, and the cgroup css reference — the latter preventing the cgroup from ever being destroyed.</p> <p>Fix by replacing blkg_put() with percpu_ref_kill(), matching the pattern used in blkg_destroy().</p> https://vulnerability.circl.lu/vuln/cve-2026-93795