{"id":17289,"date":"2026-09-05T02:30:57","date_gmt":"2026-09-04T18:30:57","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80785"},"modified":"2026-09-05T02:30:57","modified_gmt":"2026-09-04T18:30:57","slug":"cve-2026-80785","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80785","title":{"rendered":"CVE-2026-80785 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: serialize mode"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>fbdev: serialize mode sysfs access with lock_fb_info()<\/p>\n<p>show_mode(), show_modes(), and store_mode() access fb_info-&gt;modelist<br \/>\nand fb_info-&gt;mode without holding lock_fb_info(). store_modes() takes<br \/>\nlock_fb_info() while replacing the modelist and freeing the old one.<\/p>\n<p>A concurrent reader or writer can load a pointer to an old modelist<br \/>\nentry before store_modes() frees it, then dereference freed memory or<br \/>\nstore a stale freed pointer in fb_info-&gt;mode.<\/p>\n<p>Take lock_fb_info() in show_mode(), show_modes(), and store_mode() to<br \/>\nserialize with store_modes(). In show_mode(), copy the mode to the<br \/>\nstack and format after dropping the lock. In store_mode(), split<br \/>\nactivate() into a _locked variant to avoid double-locking, and hold<br \/>\nthe locks for the modelist walk, mode conversion, activation, and<br \/>\nfb_info-&gt;mode assignment together.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>fbdev: serialize mode sysfs access with lock_fb_info()<\/p>\n<p>show_mode(), show_modes(), and store_mode() access fb_info-&gt;modelist<br \/>\nand fb<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-17289","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/17289","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=17289"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17289"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17289"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}