A systemd bugfix update has been released for CentOS 7.

CEBA-2021:0351 CentOS 7 systemd BugFix Update

CentOS Errata and Bugfix Advisory 2021:0351

Upstream details at :   https://access.redhat.com/errata/RHBA-2021:0351

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

x86_64:
946b8442c4a0e72fe683a8d2c6b3ab7143aa27670b547b3ff7849aa236ae494b libgudev1-219-78.el7_9.3.i686.rpm
693e3ce2908adefcc2bc524795b6cde949103c699866ca985fd42a827214dd0e libgudev1-219-78.el7_9.3.x86_64.rpm
a8d6b71da3251c0921f8f1c9a527fe6468bab3f326f472567681e24f3f9bbd61 libgudev1-devel-219-78.el7_9.3.i686.rpm
894926755bf0b5caaf2195043acd56dcc5dc992c1c51411a5e923a6e2e1d55cb libgudev1-devel-219-78.el7_9.3.x86_64.rpm
555f6ee454fa312fb09d6fafbe3c2aa2f876b4599c73856eff9aa4d9f1b2f06c systemd-219-78.el7_9.3.x86_64.rpm
aa2d737429489d52bcd0751bd1e48ba6c8f71eb071120236b9ab47a5ae3b3ebd systemd-devel-219-78.el7_9.3.i686.rpm
a529f2b782f1a8ac2c40f6c193c7b680debbe16131700642d20f5c3c7792165f systemd-devel-219-78.el7_9.3.x86_64.rpm
920dd1baf1fd31b9436ff47d0be39b0142c33dfb36ef0255aaf0e2c529756a9b systemd-journal-gateway-219-78.el7_9.3.x86_64.rpm
22f6e0dc0621a93077ed64c276366eb9c44393ec755722b64a175a9ef296b112 systemd-libs-219-78.el7_9.3.i686.rpm
01fb3a26a807a59931faaaabe295041a8fa40561ac74f13c180818145c68eae4 systemd-libs-219-78.el7_9.3.x86_64.rpm
0ed523747db652e84c5b5a87d2207d7410229587204a4fbc5f477091cf0e9706 systemd-networkd-219-78.el7_9.3.x86_64.rpm
c3df19c15f8ddba5346c826fd07ba66f82958ff47801b4b8f2b8842525aec713 systemd-python-219-78.el7_9.3.x86_64.rpm
1cf3973fb3523d1d1a511479268703611131014d54aec79f628f19fb4b486117 systemd-resolved-219-78.el7_9.3.i686.rpm
bfbaa306ef62a274da0c3a7df6f2c28ed78243d6d6b8fc3c909b90fec19c16ba systemd-resolved-219-78.el7_9.3.x86_64.rpm
58f957357894f41ea8dce27b4768e570d26ebe184ba29202236806ebd3286af2 systemd-sysv-219-78.el7_9.3.x86_64.rpm

Source:
a1432e7f155a0554d29a6f3cc02f717b78e526ccbf77ec92d171841d7ea67275 systemd-219-78.el7_9.3.src.rpm