An unaligned memory access issue was found in the ContextualGlyphSubstProc2 in the 2D component of OpenJDK. A specially-crafted font file could cause a Java application to crash when processed.
Public now via Oracle CPU January 2022: https://www.oracle.com/security-alerts/cpujan2022.html#AppendixJAVA Fixed in Oracle Java SE 8u321 and 7u331.
OpenJDK-8 upstream commit: http://hg.openjdk.java.net/jdk8u/monojdk8u/rev/1189d9ea5725
This issue is reported to only affect Java running on Solaris platform and is not believed to be applicable to other platforms.