Name of the Vulnerable Software and Affected Versions Linux Kernel versions prior to v5.15.86

Description The issue concerns undefined behavior in a bit shift operation within the get default font function in lib/fonts. This problem was introduced in version v2.6.23 and is fixed in version v5.15.86. The actual impact and potential for attack have not been fully determined.

Recommendations For versions prior to v5.15.86, update to version v5.15.86 or later to resolve the issue.