In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
vmalloc: fix buffer overflow in vrealloc_node_align()<\/p>\n
Commit 4c5d3365882d (“mm\/vmalloc: allow to set node and align in
\nvrealloc”) added the ability to force a new allocation if the current
\npointer is on the wrong NUMA node, or if an alignment constraint is not
\nmet, even if the user is shrinking the allocation.<\/p>\n
On this path (need_realloc), the code allocates a new object of ‘size’
\nbytes and then memcpy()s ‘old_size’ bytes into it. If the request is to
\nshrink the object (size < old_size), this results in an out-of-bounds
\nwrite on the new buffer.<\/p>\n
Fix this by bounding the copy length by the new allocation size.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
vmalloc: fix buffer overflow in vrealloc_node_align()<\/p>\n
Commit 4c5d3365882d (“mm\/vmalloc: allow to set node and align in
\nvrealloc”) <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-15990","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/15990","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=15990"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15990"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15990"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}