{"id":7522,"date":"2026-09-04T18:49:35","date_gmt":"2026-09-04T10:49:35","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74520"},"modified":"2026-09-04T18:49:35","modified_gmt":"2026-09-04T10:49:35","slug":"cve-2026-74520","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74520","title":{"rendered":"CVE-2026-74520 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\niommu\/iommufd: Fix IO"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>iommu\/iommufd: Fix IOPF group ownership UAF<\/p>\n<p>iopf_group_alloc() links each last-page IOPF group into the generic IOPF<br \/>\npending list before invoking the domain fault handler.<br \/>\niommufd_fault_iopf_handler() also queued an accepted group in the<br \/>\nIOMMUFD deliver list without removing it from the generic pending list.<\/p>\n<p>When detach or HWPT replacement drops the device&#8217;s IOPF reference count<br \/>\nto zero, an IOMMU driver may call iopf_queue_remove_device(). That<br \/>\nfunction responds to and frees groups through the generic pending list<br \/>\nwithout removing the same groups from IOMMUFD&#8217;s deliver list or response<br \/>\nxarray. A later read, response, or cleanup can then access the freed<br \/>\ngroup and cause a UAF.<\/p>\n<p>Fix this by dequeuing an accepted group from the generic pending list<br \/>\nbefore IOMMUFD queues it for userspace response.<br \/>\nMake iopf_group_response() send a response regardless of pending-list<br \/>\nmembership, so the dequeued group can still be completed by IOMMUFD.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>iommu\/iommufd: Fix IOPF group ownership UAF<\/p>\n<p>iopf_group_alloc() links each last-page IOPF group into the generic IOPF<br \/>\npending list <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7522","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7522","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=7522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7522"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}