{"id":21673,"date":"2026-09-12T04:31:30","date_gmt":"2026-09-11T20:31:30","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89751"},"modified":"2026-09-12T04:31:30","modified_gmt":"2026-09-11T20:31:30","slug":"cve-2026-89751","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89751","title":{"rendered":"CVE-2026-89751 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nx86\/tdx: Fix off-by-o"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>x86\/tdx: Fix off-by-one in port I\/O handling<\/p>\n<p>handle_in() and handle_out() in arch\/x86\/coco\/tdx\/tdx.c use:<\/p>\n<p>    u64 mask = GENMASK(BITS_PER_BYTE * size, 0);<\/p>\n<p>GENMASK(h, l) includes bit h. For size=1 (INB), this produces<br \/>\nGENMASK(8, 0) = 0x1FF (9 bits) instead of GENMASK(7, 0) = 0xFF (8<br \/>\nbits). The mask is one bit too wide for all I\/O sizes.<\/p>\n<p>Fix the mask calculation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>x86\/tdx: Fix off-by-one in port I\/O handling<\/p>\n<p>handle_in() and handle_out() in arch\/x86\/coco\/tdx\/tdx.c use:<\/p>\n<p>    u64 mask = GENMASK(<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21673","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21673","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=21673"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21673"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21673"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}