{"id":17325,"date":"2026-09-05T02:30:59","date_gmt":"2026-09-04T18:30:59","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80821"},"modified":"2026-09-05T02:30:59","modified_gmt":"2026-09-04T18:30:59","slug":"cve-2026-80821","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80821","title":{"rendered":"CVE-2026-80821 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: pci-epf: put C"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>nvmet: pci-epf: put CQ ref on create_cq mapping failure<\/p>\n<p>nvmet_pci_epf_create_cq() calls nvmet_cq_create(), which takes a<br \/>\nreference on the controller and installs the completion queue. If the<br \/>\nsubsequent PCI address-space mapping fails or returns a too-small partial<br \/>\nmapping, the function jumps to err_internal \/ err_unmap_queue without<br \/>\ncalling nvmet_cq_put(). The matching put in nvmet_pci_epf_delete_cq() is<br \/>\ngated on NVMET_PCI_EPF_Q_LIVE, which is only set after the mapping<br \/>\nsucceeds, so teardown never releases these references. A remote PCI host<br \/>\nthat drives Create IO CQ commands with a failing PRP1\/pci_addr therefore<br \/>\nleaks the CQ and a controller reference on each attempt.<\/p>\n<p>Drop the CQ reference on the mapping-failure paths. The err_internal and<br \/>\nerr_unmap_queue labels are only reachable after nvmet_cq_create() has<br \/>\nsucceeded, so this pairs the create\/put correctly.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>nvmet: pci-epf: put CQ ref on create_cq mapping failure<\/p>\n<p>nvmet_pci_epf_create_cq() calls nvmet_cq_create(), which takes a<br \/>\nreference<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-17325","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/17325","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=17325"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17325"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17325"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}