In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
fs\/statmount: fix slab out-of-bounds write in statmount_mnt_idmap<\/p>\n
statmount_mnt_idmap() writes one mapping with seq_printf() and then
\nmanually advances seq->count to include the NUL separator.<\/p>\n
If seq_printf() overflows, seq_set_overflow() sets seq->count to
\nseq->size. The manual seq->count++ changes this to seq->size + 1.
\nseq_has_overflowed() then no longer detects the overflow. The corrupted
\ncount returns to statmount_string(), which later executes:<\/p>\n
seq->buf[seq->count++] = ”;<\/p>\n
This causes a 1-byte NULL out-of-bounds write on the dynamically
\nallocated seq buffer.<\/p>\n
Fix this by checking for overflow immediately after seq_printf().<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
fs\/statmount: fix slab out-of-bounds write in statmount_mnt_idmap<\/p>\n
statmount_mnt_idmap() writes one mapping with seq_printf() and t<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-15054","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/15054","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=15054"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15054"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15054"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}