title: Memory disclosure by stale virtual memory mapping
description: A particular case of memory sharing is mishandled in the virtual memory system.  This is very similar to SA-21:08.vm, but with a different root cause.
An unprivileged local user process can maintain a mapping of a page after it is freed, allowing that process to read private data belonging to other processes or the kernel.
affected:
{
defaultStatus: unknown
modules: vm
product: FreeBSD
vendor: FreeBSD
versions:
lessThan: p1, status: affected, version: 13.1-RELEASE, versionType: release
lessThan: p12, status: affected, version: 13.0-RELEASE, versionType: release
lessThan: p6, status: affected, version: 12.3-RELEASE, versionType: release
}