CVE-2020-16120

A flaw was found in the User namespace on an overlay filesystem in the Linux Kernel, Where a file with no access privilege was able to copy the file to a user defined mount point. An attacker with a special user privilege locally may lead to a kernel information leak problem.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Red Hat feels this flaw needs a number of conditions in place for the attacker to exploit, and the mitigation for this issue is to avoid a target file t existing on an overlay filesystem, accessible in the namespace, which is writable by the exploiting target.