{"id":41071,"date":"2026-10-19T00:32:01","date_gmt":"2026-10-18T16:32:01","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98599"},"modified":"2026-10-19T00:32:01","modified_gmt":"2026-10-18T16:32:01","slug":"cve-2026-98599","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98599","title":{"rendered":"CVE-2026-98599 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject non-negat"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>bpf: Reject non-negative offsets in stack_slot_obj_get_spi()<\/p>\n<p>bpf_get_spi() computes (-off &#8211; 1) \/ BPF_REG_SIZE using C division,<br \/>\nwhich truncates toward zero. For off == 0, this produces spi 0, the<br \/>\nsame index used by the valid stack slot at fp-8.<\/p>\n<p>stack_slot_obj_get_spi() currently checks alignment and the resulting<br \/>\nspi bounds, but does not reject the non-negative offset itself. It can<br \/>\ntherefore validate a PTR_TO_STACK register holding fp+0 against an<br \/>\niterator stored at fp-8 even though the runtime receives the actual fp+0<br \/>\npointer. An effectful iterator kfunc can then interpret memory outside<br \/>\nthe BPF stack as iterator state.<\/p>\n<p>Reject non-negative offsets before converting the offset to an spi. All<br \/>\nvalid stack objects begin at a negative offset from the frame pointer.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>bpf: Reject non-negative offsets in stack_slot_obj_get_spi()<\/p>\n<p>bpf_get_spi() computes (-off &#8211; 1) \/ BPF_REG_SIZE using C division,<br \/>\nwh<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41071","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41071","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=41071"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41071"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41071"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}