{"id":25899,"date":"2026-09-18T04:32:03","date_gmt":"2026-09-17T20:32:03","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-93040"},"modified":"2026-09-18T04:32:03","modified_gmt":"2026-09-17T20:32:03","slug":"cve-2026-93040","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-93040","title":{"rendered":"CVE-2026-93040 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: dw-edma: S"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>dmaengine: dw-edma: Serialize channel state checks<\/p>\n<p>pause() and resume() read and update channel state without holding vc.lock,<br \/>\nwhile the interrupt handlers update the same state under it. Take the same<br \/>\nlock around those state checks so that request, status, and configured stay<br \/>\nconsistent.<\/p>\n<p>For example, pause() can observe EDMA_ST_BUSY right before the interrupt<br \/>\nhandler completes the final descriptor and moves the channel to<br \/>\nEDMA_ST_IDLE, and then record EDMA_REQ_PAUSE on an already idle channel. No<br \/>\nfurther interrupt will acknowledge the request, and since issue_pending()<br \/>\nrequires EDMA_REQ_NONE, the channel is wedged for good: terminate_all()<br \/>\nleaves the stale request behind, so even reconfiguring the channel does not<br \/>\nrecover it.<\/p>\n<p>issue_pending() already runs under vc.lock, but it tests configured before<br \/>\ntaking it. Move that test under the lock as well, so configured, request,<br \/>\nand status are evaluated as one channel-state snapshot.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>dmaengine: dw-edma: Serialize channel state checks<\/p>\n<p>pause() and resume() read and update channel state without holding vc.lock,<br \/>\nwhi<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25899","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25899","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=25899"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25899"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}