In Eclipse OpenJ9, prior to the 0.12.0 release, the jio_snprintf() and jio_vsnprintf() native methods ignored the length parameter. This affects existing APIs that called the functions to exceed the allocated buffer. This functions were not directly callable by non-native user code.
https://bugs.eclipse.org/bugs/show_bug.cgi?id=543659
https://access.redhat.com/errata/RHSA-2019:1238
https://access.redhat.com/errata/RHSA-2019:0640
https://access.redhat.com/errata/RHSA-2019:0474
https://access.redhat.com/errata/RHSA-2019:0473