Red Hat Security Advisory 2020-0515-01 - KornShell is a Unix shell developed by AT&T Bell Laboratories, which is backward-compatible with the Bourne shell and includes many features of the C shell. The most recent version is KSH-93. KornShell complies with the POSIX.2 standard. A code injection vulnerability has been addressed.

Source: Red Hat Security Advisory 2020-0515-01