In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
vhost\/vdpa: validate virtqueue index in mmap and fault paths<\/p>\n
vhost_vdpa_mmap() and vhost_vdpa_fault() use vma->vm_pgoff as a
\nvirtqueue index for get_vq_notification(), but they do not validate
\nthat the index is smaller than v->nvqs.<\/p>\n
The ioctl path already performs both a bounds check and
\narray_index_nospec(), but the mmap\/fault path only checks that the
\nindex fits in u16. This allows an out-of-range queue index to reach
\ndriver-specific get_vq_notification() callbacks.<\/p>\n
Fix this by extracting a unified vhost_vdpa_get_vq_notification()
\nhelper that validates the queue index against v->nvqs and applies
\narray_index_nospec() before calling the driver callback. Both the
\nmmap and fault paths use this helper, and the bounds checking is
\nconsolidated into a single location.<\/p>\n
From source inspection, the most defensible impact is out-of-bounds
\naccess in the callback path, potentially leading to invalid PFN
\nremaps and crash\/DoS.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
vhost\/vdpa: validate virtqueue index in mmap and fault paths<\/p>\n
vhost_vdpa_mmap() and vhost_vdpa_fault() use vma->vm_pgoff as a
\nvirtq<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7256","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7256","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=7256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}