A kexec-tools bugfix update has been released for CentOS 7.

CEBA-2021:2320 CentOS 7 kexec-tools BugFix Update

CentOS Errata and Bugfix Advisory 2021:2320

Upstream details at :   https://access.redhat.com/errata/RHBA-2021:2320

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

x86_64:
e855f087b1b23b7efc6503e87350c4cca1ef6881dc97c31f1512bcda747a478b kexec-tools-2.0.15-51.el7_9.3.x86_64.rpm
3594f2b7367495aba0e2ad40d7aeabb3ec7bcd176bfa09127a9021573f936f66 kexec-tools-anaconda-addon-2.0.15-51.el7_9.3.x86_64.rpm
9bfce694395b42428b130fade4131953efe8248a166cb9df74a2681d8de08ecb kexec-tools-eppic-2.0.15-51.el7_9.3.x86_64.rpm

Source:
07092417ea1e265395d2d7fa9fbf8bd3239e34f7d6423dbc09085cacbb856738 kexec-tools-2.0.15-51.el7_9.3.src.rpm