In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
drm\/vmwgfx: bound DMA command body size against suffix pointer<\/p>\n
vmw_cmd_dma() locates the DMA suffix at<\/p>\n
\t(unsigned long) &cmd->body + header->size – sizeof(*suffix)<\/p>\n
without checking that header->size is large enough to contain both
\ncmd->body and the suffix. An undersized header makes the suffix
\npointer underflow back into the previous command in the bounce
\nbuffer. The verifier later writes suffix->maximumOffset, clobbering
\nverified fields of an already-relocated earlier command — a TOCTOU
\non the device-visible command stream that lets one command rewrite
\nanother’s GMR id, surface id, or other authenticated fields.<\/p>\n
Reject the command if the body is too small for the suffix to fit.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
drm\/vmwgfx: bound DMA command body size against suffix pointer<\/p>\n
vmw_cmd_dma() locates the DMA suffix at<\/p>\n
\t(unsigned long) &cmd->bod<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7426","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7426","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=7426"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7426"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7426"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}