{"id":3300,"date":"2026-09-04T04:59:36","date_gmt":"2026-09-03T20:59:36","guid":{"rendered":"https:\/\/www.54iter.cn\/?p=3300"},"modified":"2026-09-04T04:59:36","modified_gmt":"2026-09-03T20:59:36","slug":"cve-2026-53671","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-53671","title":{"rendered":"CVE-2026-53671 &#8211; PREVAIL is a Polynomial-Runtime EBPF Verifier using an Abstract Interpretation Layer. Prio"},"content":{"rendered":"<p>PREVAIL is a Polynomial-Runtime EBPF Verifier using an Abstract Interpretation Layer. Prior to version 0.2.4, the abstract transformer in prevail treats writes through a T_CTX-typed base register as a silent no-op: do_mem_store in src\/crab\/ebpf_transformer.cpp only models T_STACK stores, and the checker&#8217;s T_CTX bounds arm never tests AccessType::write. An attacker can craft an eBPF program that overwrites a context field (e.g., ctx-&gt;data), reload that field typed as T_PACKET, and dereference an attacker-controlled address \u2014 and prevail will report the program as safe. This issue has been patched in version 0.2.4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PREVAIL is a Polynomial-Runtime EBPF Verifier using an Abstract Interpretation Layer. Prior to version 0.2.4, the abstract transformer in prevail treats writes through a T_CTX-typed base register as a<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-3300","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/3300","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=3300"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3300"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}