{"id":24491,"date":"2026-09-16T20:32:23","date_gmt":"2026-09-16T12:32:23","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89804"},"modified":"2026-09-16T20:32:23","modified_gmt":"2026-09-16T12:32:23","slug":"cve-2026-89804","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89804","title":{"rendered":"CVE-2026-89804 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\ndrm\/nouveau\/dmem: fix"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>drm\/nouveau\/dmem: fix mismatched DMA unmap size for large folios<\/p>\n<p>Device-private THP migration maps migration buffers with page_size()<br \/>\nand records that length in dma_info-&gt;size.  For a compound folio<br \/>\npage_size() is PAGE_SIZE &lt; 0 folio this unmaps less than was mapped, leaking the<br \/>\nremainder of the IOMMU\/IOVA mapping.  The other unmap sites, in<br \/>\nnouveau_dmem_migrate_chunk() and nouveau_dmem_evict_chunk(), already<br \/>\nuse the saved size; use it here too.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>drm\/nouveau\/dmem: fix mismatched DMA unmap size for large folios<\/p>\n<p>Device-private THP migration maps migration buffers with page_siz<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24491","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24491","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=24491"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24491"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}