{"id":28688,"date":"2026-09-25T04:31:35","date_gmt":"2026-09-24T20:31:35","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-97441"},"modified":"2026-09-25T04:31:35","modified_gmt":"2026-09-24T20:31:35","slug":"cve-2026-97441","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-97441","title":{"rendered":"CVE-2026-97441 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nata: ahci: fail probe"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ata: ahci: fail probe if BAR too small for claimed ports<\/p>\n<p>When an AHCI controller is disabled in BIOS, its HOST_CAP register may<br \/>\ncontain a bogus value, e.g. 0xFFFFFFFF.<\/p>\n<p>Since CAP.NP (Number of Ports) is a zeroes based 5-bit register field,<br \/>\na value of 0x1f means 32 ports. If CAP.NP claims more ports than can<br \/>\nphysically fit within the mapped BAR region, accessing port registers<br \/>\nbeyond the BAR boundary causes a kernel panic.<\/p>\n<p>Add validation in ahci_init_one() to check that the BAR size is<br \/>\nsufficient for the number of ports claimed in CAP.NP. The check<br \/>\ncalculates the required MMIO size as:<\/p>\n<p>  required_size = 0x100 (global registers) + max_ports * 0x80<\/p>\n<p>If required_size exceeds the actual BAR size, the probe fails with<br \/>\n-ENODEV, preventing the panic and providing a clear error message.<\/p>\n<p>[cassel: commit log]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ata: ahci: fail probe if BAR too small for claimed ports<\/p>\n<p>When an AHCI controller is disabled in BIOS, its HOST_CAP register may<br \/>\nco<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-28688","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/28688","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=28688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}