In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
dm-pcache: only hand out initialized cache segments<\/p>\n
get_cache_segment() scans the segment map up to cache->n_segs, the
\nphysical device segment count, but cache_segs_init() only initializes
\nthe first cache_info->n_segs segments. A crafted image with
\ncache_info->n_segs smaller than the device count leaves the remaining
\npcache_cache_segment structs zeroed (segment.data == NULL), and the
\nallocator can hand one to cache_kset_close(), which writes through the
\nreturned segment’s data pointer with no NULL check.<\/p>\n
Bound the allocator’s search to cache_info->n_segs so only initialized
\nsegments are ever returned. A conforming cache sets n_segs equal to the
\ndevice segment count, so this rejects nothing legitimate.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
dm-pcache: only hand out initialized cache segments<\/p>\n
get_cache_segment() scans the segment map up to cache->n_segs, the
\nphysical de<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21289","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21289","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=21289"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21289"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21289"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}