In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
perf tools: Use perf_env__get_cpu_topology() in machine__resolve()<\/p>\n
machine__resolve() accesses env->cpu[al->cpu].socket_id after checking
\nal->cpu >= 0 and env->cpu != NULL, but without validating al->cpu
\nagainst env->nr_cpus_avail. Since al->cpu comes from the untrusted
\nperf.data sample, a crafted file with a large CPU index causes an
\nout-of-bounds heap read.<\/p>\n
Use perf_env__get_cpu_topology() which validates both NULL and bounds.
\nAlso bounds-check al->cpu before the cast to struct perf_cpu (int16_t):
\nwithout this, values like 65536 silently truncate to 0, bypassing the
\naccessor’s internal check and returning CPU 0’s topology.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
perf tools: Use perf_env__get_cpu_topology() in machine__resolve()<\/p>\n
machine__resolve() accesses env->cpu[al->cpu].socket_id after c<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-12329","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/12329","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=12329"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12329"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12329"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}