CVE-2020-12655

A flaw was discovered in the XFS source in the Linux kernel. This flaw allows an attacker with the ability to mount an XFS filesystem, to trigger a denial of service while attempting to sync a file located on an XFS v5 image with crafted metadata.

This issue is rated as having Low impact because of the preconditions needed to trigger it (administrative account or physical access).

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.

This flaw requires an attacker being able to have the system mount a crafted filesystem.

If the xfs filesystem is not in use, the 'xfs' kernel module can be blacklisted and the module will not be loaded when the filesystem is mounted, mounting will fail.

However, if this filesystem is in use, this workaround will not be suitable.

To find out how to blacklist the "xfs" kernel module please see https://access.redhat.com/solutions/41278 or contact Red hat Global Support services