{"id":24498,"date":"2026-09-16T20:32:23","date_gmt":"2026-09-16T12:32:23","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89811"},"modified":"2026-09-16T20:32:23","modified_gmt":"2026-09-16T12:32:23","slug":"cve-2026-89811","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89811","title":{"rendered":"CVE-2026-89811 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\ndrm\/amdkfd: Add TLB f"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>drm\/amdkfd: Add TLB flush after MES queue eviction\/suspension<\/p>\n<p>MES (Micro Engine Scheduler) does not perform heavy-weight TLB<br \/>\ninvalidation after unmapping queues, unlike HWS which does this<br \/>\nautomatically. This causes a race condition where in-flight DMA<br \/>\ndescriptors can access memory that has been unmapped, leading to page<br \/>\nfaults and GPU queue hangs during SVM page migration.<\/p>\n<p>The issue manifests as KFDSVMRangeTest.MultiThreadMigrationTest<br \/>\nfailures on gfx1151 (Strix Point) with XNACK mode 1 enabled &#8211; the GPU<br \/>\ncompute queue hangs with packets submitted but never consumed.<\/p>\n<p>Add kfd_flush_tlb() calls after MES queue removal in two locations:<br \/>\n&#8211; evict_process_queues_cpsch(): after all queues removed during eviction<br \/>\n&#8211; suspend_queues(): after debug\/criu queue suspension (with mem_fence barrier)<\/p>\n<p>This ensures all in-flight memory accesses from unmapped queues are<br \/>\nflushed before memory is freed or migrated.<\/p>\n<p>(cherry picked from commit f5c4f88e0f9c45a8fb9dfac0c1df726c95e41b77)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>drm\/amdkfd: Add TLB flush after MES queue eviction\/suspension<\/p>\n<p>MES (Micro Engine Scheduler) does not perform heavy-weight TLB<br \/>\ninval<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24498","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24498","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=24498"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24498"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24498"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}