UBUNTU-CVE-2026-42779

The fix for CVE-2026-41635 was not applied to the 2.1.X and 2.2.X branches. Here was the original issue description: Apache MINA's AbstractIoBuffer.resolveClass contains two branches, one of them for static classes or primitive types does not check the class at all, bypassing the classname...

CVE-2026-41635 Apache MINA: AbstractIoBuffer.resolveClass() null-clazz Branch Skips acceptMatchers Filter — Full Object Deserialization RCE

Apache MINA's AbstractIoBuffer.resolveClass contains two branches, one of them for static classes or primitive types does not check the class at all, bypassing the classname allowlist and allowing arbitrary code to be executed. The fix checks if the class is present in the accepted class...