{"id":33331,"date":"2026-10-06T20:31:47","date_gmt":"2026-10-06T12:31:47","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98262"},"modified":"2026-10-06T20:31:47","modified_gmt":"2026-10-06T12:31:47","slug":"cve-2026-98262","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98262","title":{"rendered":"CVE-2026-98262 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nata: libahci: clear P"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ata: libahci: clear PxCLBU and PxFBU for AHCI_HFLAG_32BIT_ONLY<\/p>\n<p>A user reported that commit 105c42566a55 (&#8220;ata: ahci: force 32-bit DMA for<br \/>\nJMicron JMB582\/JMB585&#8221;) made the JMicron JMB585 unusable on his board.<\/p>\n<p>The failure is seen as soon as the ahci driver is probed, and booting with<br \/>\niommu=off does not solve the problem.<\/p>\n<p>Looking at the AHCI specification, PxCLBU and PxFBU are both read only &#8216;0&#8217;<br \/>\nfor HBAs that do not support 64-bit addressing.<\/p>\n<p>For HBAs that do support 64-bit addressing, the registers are read write,<br \/>\nwith a reset value that is Implementation Specific.<\/p>\n<p>When using the AHCI_HFLAG_32BIT_ONLY flag, the HBA does support 64-bit<br \/>\naddressing, and a 32-bit DMA mask is set by simply clearing HOST_CAP_64.<br \/>\nThus, in this case, we need to explicitly clear the registers to 0.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ata: libahci: clear PxCLBU and PxFBU for AHCI_HFLAG_32BIT_ONLY<\/p>\n<p>A user reported that commit 105c42566a55 (&#8220;ata: ahci: force 32-bit <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-33331","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/33331","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=33331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33331"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}