CVE-2021-47119

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A memory leak issue has been resolved in the Linux kernel, specifically in the ext4 file system. The problem occurs when buffer head references are not released before calling kill bdev(), resulting in the buffer head and its associated page not being freed. This issue can be reproduced by creating an infinite loop of starting and stopping a mount point using systemctl. The memory leak is amplified by systemd creating a cgroup for each slice, which never gets freed, leading to increased memory consumption.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.