In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
bpf: Reject arena frees below the arena base<\/p>\n
bpf_arena_free_pages() accepts scalar arena addresses. The runtime
\nmasks the address to the low 32 bits and reconstructs a full user
\naddress from the arena base before returning the range to the arena
\nfree tree.<\/p>\n
When the scalar value is below the low 32 bits of the arena base,
\nfull_uaddr falls below user_vm_start. The existing upper-end clipping
\nthen turns this into an out-of-range free-tree offset. A later
\nallocation can reuse that offset and return an address below the arena
\nmapping.<\/p>\n
Reject such frees before computing the clipped range.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
bpf: Reject arena frees below the arena base<\/p>\n
bpf_arena_free_pages() accepts scalar arena addresses. The runtime
\nmasks the address <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25904","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25904","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=25904"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25904"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}