{"id":24709,"date":"2026-09-16T20:32:40","date_gmt":"2026-09-16T12:32:40","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-90021"},"modified":"2026-09-16T20:32:40","modified_gmt":"2026-09-16T12:32:40","slug":"cve-2026-90021","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-90021","title":{"rendered":"CVE-2026-90021 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_midi:"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>usb: gadget: f_midi: initialize work in f_midi_alloc()<\/p>\n<p>f_midi_alloc initializes free_ref to 1 and it can only be incremented<br \/>\nwhen a sound card is registered via f_midi_register_card().<br \/>\nf_midi_register_card() is only called in f_midi_bind() which actually<br \/>\nperforms INIT_WORK. If f_midi_bind() is never run, work is not<br \/>\ninitialized and the if condition in f_midi_free becomes true,<br \/>\nthis results in a warning later in __flush_work as work-&gt;func = 0.<br \/>\nFix this by moving INIT_WORK from f_midi_bind() to f_midi_alloc().<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>usb: gadget: f_midi: initialize work in f_midi_alloc()<\/p>\n<p>f_midi_alloc initializes free_ref to 1 and it can only be incremented<br \/>\nwhen <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24709","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24709","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=24709"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24709"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24709"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}