{"id":21372,"date":"2026-09-12T04:31:06","date_gmt":"2026-09-11T20:31:06","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89450"},"modified":"2026-09-12T04:31:06","modified_gmt":"2026-09-11T20:31:06","slug":"cve-2026-89450","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89450","title":{"rendered":"CVE-2026-89450 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\niommu\/tegra241-cmdqv:"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>iommu\/tegra241-cmdqv: Reject a vSID wider than the SID_MATCH field<\/p>\n<p>tegra241_vintf_init_vsid() programs the guest-provided vSID into SID_MATCH,<br \/>\nwhose VIRT_SID field spans bits [20:1] with bit 0 as the match-enable flag.<br \/>\nThe HW therefore matches only a 20-bit Stream ID.<\/p>\n<p>The bound check rejects only virt_sid &gt; UINT_MAX, which admits a value far<br \/>\nwider than the field. The write &#8220;virt_sid &lt;virt_id<br \/>\nis guest-controlled, a VMM can trigger it.<\/p>\n<p>Validate virt_sid against the field width with FIELD_MAX(), and program the<br \/>\nregister with FIELD_PREP() so the value and the field stay consistent.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>iommu\/tegra241-cmdqv: Reject a vSID wider than the SID_MATCH field<\/p>\n<p>tegra241_vintf_init_vsid() programs the guest-provided vSID int<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21372","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21372","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=21372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}