In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
selinux: reject a permission value exceeding the class permission count<\/p>\n
perm_read() bounds a permission value by SEL_VEC_MAX but never by the
\nnprim of the owning class or common, which is taken verbatim from the
\npolicy image. security_get_permissions() then writes perms[value – 1]
\ninto an nprim-sized kcalloc() array, so a class declaring fewer
\npermissions than its largest permission value drives an out-of-bounds
\nheap write. The top-level symbol tables are validated this way; the
\nnested per-class permission table is not.<\/p>\n
Reject a permission whose value exceeds nprim, which is already set when
\nperm_read() runs. Well-formed policies are unaffected.<\/p>\n
[PM: tweak comment for line length]<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
selinux: reject a permission value exceeding the class permission count<\/p>\n
perm_read() bounds a permission value by SEL_VEC_MAX but n<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-3407","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/3407","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=3407"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3407"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3407"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}