A glibc security update has been released for CentOS 7.

CESA-2021:0348 Moderate CentOS 7 glibc Security Update

CentOS Errata and Security Advisory 2021:0348 Moderate

Upstream details at :   https://access.redhat.com/errata/RHSA-2021:0348

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

x86_64:
c7dec18b5dff68e91dd42275e011d20aecbe60817c948f50fef7adfc8276ec34 glibc-2.17-322.el7_9.i686.rpm
d41ecaf1cea900f2c9354fc197197c80a88316766208fa264735e4153be0668e glibc-2.17-322.el7_9.x86_64.rpm
c59d4299cbd7dc796fc38b8ac3ad9e4a8030d20ee8831940a24af8b28a84cca5 glibc-common-2.17-322.el7_9.x86_64.rpm
43b68e9aee5969d0a7628cb49b8b9e8a4b328432cd2bbf3a542567a7d9be9cc8 glibc-devel-2.17-322.el7_9.i686.rpm
1cdd1bc2cbd53aa25851e70a8024e7e85db9b9d0fcdfcc2df323c89e5944ec7a glibc-devel-2.17-322.el7_9.x86_64.rpm
b05ac36a6c2c5fb2a3b34dee8aff347281f1ee28b49846b4add728a5cd69f06a glibc-headers-2.17-322.el7_9.x86_64.rpm
aeb54137355c495d8cbda465df5347f7e0075a2330f89bc679ccd9d8f8d5b4f6 glibc-static-2.17-322.el7_9.i686.rpm
650dc5eb73a88b8297704da202b361a3a2367643c25269a9d667ea5803dbc397 glibc-static-2.17-322.el7_9.x86_64.rpm
deefbf7dc62157f10bf35bfcceae5fb497403a6fbf86fef1e8cfd5636f7bad10 glibc-utils-2.17-322.el7_9.x86_64.rpm
05fbad1e72d3fc82cab1e83391bf6c22c224dd3554ceed92227b792e08bf75b4 nscd-2.17-322.el7_9.x86_64.rpm

Source:
223ac0904b0d7693bcc447dbb963c05ed47d88b46eaf9b5ec694b061988abd86 glibc-2.17-322.el7_9.src.rpm