In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
SUNRPC: always drain cache_cleaner before destroying a cache_detail<\/p>\n
sunrpc_destroy_cache_detail() only cancels the global cache_cleaner
\ndelayed_work when cache_list is empty. During per-netns teardown
\ncache_list is never empty because init_net’s caches remain registered,
\nso the cancel never fires. After unlink, the caller proceeds to
\ncache_destroy_net() which kfrees the cache_detail while cache_clean()
\nmay still hold a dangling pointer to it. The result is a
\nuse-after-free: cache_dequeue() takes cd->queue_lock on freed memory,
\nand cache_put() dereferences cd->cache_put as a function pointer from
\nfreed slab.<\/p>\n
Drop the list_empty guard so that cancel_delayed_work_sync() always
\nruns, ensuring any in-flight cache_clean() completes before the
\ncache_detail is freed. Re-arm the cleaner afterwards if other caches
\nare still registered.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
SUNRPC: always drain cache_cleaner before destroying a cache_detail<\/p>\n
sunrpc_destroy_cache_detail() only cancels the global cache_cl<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21470","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21470","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=21470"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21470"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21470"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}