{"id":6844,"date":"2026-09-04T18:49:19","date_gmt":"2026-09-04T10:49:19","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-72220"},"modified":"2026-09-04T18:49:19","modified_gmt":"2026-09-04T10:49:19","slug":"cve-2026-72220","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-72220","title":{"rendered":"CVE-2026-72220 [CRITICAL] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nsunrpc: harden rq_pro"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>sunrpc: harden rq_procinfo lifecycle to prevent double-free<\/p>\n<p>The svc_release_rqst() function executes the callback inside<br \/>\nrqstp-&gt;rq_procinfo-&gt;pc_release. However, if a worker thread begins<br \/>\nprocessing a new request and encounters an early error path (e.g.,<br \/>\nunsupported protocol, short frame, or bad auth) before a valid<br \/>\nrq_procinfo is installed, a stale release hook can be re-triggered<br \/>\nagainst reused state from the previous RPC, resulting in a double-free<br \/>\nor use-after-free vulnerability.<\/p>\n<p>Harden the lifecycle of rq_procinfo by:<br \/>\n1. Ensuring svc_release_rqst() always clears rq_procinfo after the<br \/>\n   optional pc_release() call, regardless of whether the hook exists.<br \/>\n2. Explicitly clearing rq_procinfo at request entry in svc_process()<br \/>\n   before any early decode or drop paths.<br \/>\n3. Ensuring svc_process_bc() does the same at backchannel entry.<\/p>\n<p>This guarantees that error flows will not encounter a non-NULL stale<br \/>\nrq_procinfo pointer when there is nothing to release.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>sunrpc: harden rq_procinfo lifecycle to prevent double-free<\/p>\n<p>The svc_release_rqst() function executes the callback inside<br \/>\nrqstp-&gt;rq<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-6844","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/6844","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6844"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6844"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6844"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}