{"id":28504,"date":"2026-09-25T00:31:34","date_gmt":"2026-09-24T16:31:34","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-93240"},"modified":"2026-09-25T00:31:34","modified_gmt":"2026-09-24T16:31:34","slug":"cve-2026-93240","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-93240","title":{"rendered":"CVE-2026-93240 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nmemcg: make the v1 so"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>memcg: make the v1 soft limit knob inert<\/p>\n<p>The v1 soft limit has been deprecated since v6.12 and nobody has reported<br \/>\ndepending on it.  Start the removal by decoupling the interface from the<br \/>\nimplementation: keep memory.soft_limit_in_bytes, but ignore writes to it<br \/>\nand always report the maximum value on read similar to what<br \/>\nmemory.kmem.limit_in_bytes already does.<\/p>\n<p>Writes are still parsed, so malformed input keeps returning -EINVAL.  The<br \/>\nknob now also behaves the same everywhere: it used to return -EOPNOTSUPP<br \/>\non PREEMPT_RT, where soft limit reclaim has always been disabled.<\/p>\n<p>This also fixes the syzbot report linked below.  Soft limit reclaim is the<br \/>\nonly caller that runs shrink_lruvec() from kswapd against a specific<br \/>\nmemcg, so it is the only way to reach lru_gen_shrink_lruvec() and in turn<br \/>\nset_mm_walk(), which warns when called from kswapd.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>memcg: make the v1 soft limit knob inert<\/p>\n<p>The v1 soft limit has been deprecated since v6.12 and nobody has reported<br \/>\ndepending on it<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-28504","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/28504","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=28504"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28504"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28504"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}