{"id":26043,"date":"2026-09-18T04:32:16","date_gmt":"2026-09-17T20:32:16","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-93186"},"modified":"2026-09-18T04:32:16","modified_gmt":"2026-09-17T20:32:16","slug":"cve-2026-93186","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-93186","title":{"rendered":"CVE-2026-93186 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\ncxl\/mbox: Clamp mailb"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>cxl\/mbox: Clamp mailbox output allocation to the payload size<\/p>\n<p>CXL_MEM_SEND_COMMAND bounds the user&#8217;s in.size to the mailbox payload<br \/>\nsize but leaves out.size unbounded, then cxl_mbox_cmd_ctor() calls<br \/>\nkvzalloc(out.size). A large out.size drives a huge allocation, above<br \/>\nINT_MAX it WARNs and taints, and with panic_on_warn=1 it panics.<\/p>\n<p>The transport __cxl_pci_mbox_send_cmd() already clamps the response copy<br \/>\nto min(out.size, payload_size, device len), so the output buffer is<br \/>\nnever written beyond payload_size. Clamp the allocation to payload_size<br \/>\ntoo, matching the RAW path.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>cxl\/mbox: Clamp mailbox output allocation to the payload size<\/p>\n<p>CXL_MEM_SEND_COMMAND bounds the user&#8217;s in.size to the mailbox payloa<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-26043","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/26043","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=26043"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=26043"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=26043"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}