https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Wed, 30 Sep 2026 03:38:10 +0000 https://vulnerability.circl.lu/vuln/cve-2026-63802 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>blk-cgroup: fix UAF in __blkcg_rstat_flush()</p> <p>When multiple blkgs in the same blkcg are released concurrently, a use-after-free can occur. The race happens when one blkg&#39;s __blkcg_rstat_flush() removes another blkg&#39;s iostat entries via llist_del_all(). The second blkg sees an empty list and proceeds to free itself while the first is still iterating over its entries.</p> <p>Move the flush from __blkg_release() (RCU callback) to blkg_release() (before call_rcu). This ensures the RCU grace period waits for any concurrent flush&#39;s rcu_read_lock() section to complete before freeing.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>blk-cgroup: fix UAF in __blkcg_rstat_flush()</p> <p>When multiple blkgs in the same blkcg are released concurrently, a use-after-free can occur. The race happens when one blkg&#39;s __blkcg_rstat_flush() removes another blkg&#39;s iostat entries via llist_del_all(). The second blkg sees an empty list and proceeds to free itself while the first is still iterating over its entries.</p> <p>Move the flush from __blkg_release() (RCU callback) to blkg_release() (before call_rcu). This ensures the RCU grace period waits for any concurrent flush&#39;s rcu_read_lock() section to complete before freeing.</p> https://vulnerability.circl.lu/vuln/cve-2026-63802