Linux expand_downwards() / munmap() Race Condition

Linux =4.20: expanddownwards can race with munmap page table freeing Since 4.20, domunmap downgrades the mmapsem from write-locked to read-locked after detaching the VMAs from the mmstruct, but before dropping references to pages and freeing page tables. This ought to be safe because VMA tree...

Important: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 6.7 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for...