{"id":41103,"date":"2026-10-19T00:32:10","date_gmt":"2026-10-18T16:32:10","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98631"},"modified":"2026-10-19T00:32:10","modified_gmt":"2026-10-18T16:32:10","slug":"cve-2026-98631","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98631","title":{"rendered":"CVE-2026-98631 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Use a 32-bit com"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>xsk: Use a 32-bit compare in xsk_map_gen_lookup<\/p>\n<p>xsk_map_gen_lookup() loads a u32 key and compares it with max_entries<br \/>\nusing BPF_JMP_IMM. BPF immediates are sign-extended to 64 bits, so a<br \/>\nmax_entries value of 0x80000000 or higher becomes a threshold larger<br \/>\nthan every zero-extended 32-bit key. An out-of-range index then skips<br \/>\nthe bounds check and the generated lookup reads past xsk_map[].<\/p>\n<p>Compare with BPF_JMP32_IMM so the check stays in 32-bit unsigned range.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>xsk: Use a 32-bit compare in xsk_map_gen_lookup<\/p>\n<p>xsk_map_gen_lookup() loads a u32 key and compares it with max_entries<br \/>\nusing BPF_JM<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41103","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41103","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=41103"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41103"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41103"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}