A krb5 security update has been released for CentOS 7.

CESA-2022:8640 Important CentOS 7 krb5 Security Update

CentOS Errata and Security Advisory 2022:8640 Important

Upstream details at :   https://access.redhat.com/errata/RHSA-2022:8640

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

x86_64:
fbc2fabe0f2dd520e1af93518f0669fbb0c91b469d7508a7402404cbbea73b6d krb5-devel-1.15.1-55.el7_9.i686.rpm
b3cdcec7059a05b036622e2b2326259602d28b19672e0fe8766f1b0c59537bc9 krb5-devel-1.15.1-55.el7_9.x86_64.rpm
f7291bdf6020187d7cf5369c95f16faeef861f866ffc8c46c03116ea2adf9092 krb5-libs-1.15.1-55.el7_9.i686.rpm
0b514834510f57ab09a2051d0b0c2be8a61777452ad125d1b3e5e90abeb6fa22 krb5-libs-1.15.1-55.el7_9.x86_64.rpm
b64165d72cf869748c81b8e41581c93b8354747c22d548ae910ab54e118a90a5 krb5-pkinit-1.15.1-55.el7_9.x86_64.rpm
2da57e3f11f7feb8e50c18578d16794bb2a9a020b5c7c2a5ed12d4c49a0e597d krb5-server-1.15.1-55.el7_9.x86_64.rpm
9f8bb077bbb9a1599bd7dfb6b7973517ca6a23674134edc3822c31d459a0fcf0 krb5-server-ldap-1.15.1-55.el7_9.x86_64.rpm
caf7f0adf042b63657e0610f87dbb3aa3334f9a81292aa836ddc648117954f9d krb5-workstation-1.15.1-55.el7_9.x86_64.rpm
8f22a24548ec519571fd7dcc4779339bb29955be70e289533d286d4069cdfe23 libkadm5-1.15.1-55.el7_9.i686.rpm
ec1b22bbbd65cf0d8ac4abc748b4d4e1721149c816440d123ce3d707e25059a8 libkadm5-1.15.1-55.el7_9.x86_64.rpm

Source:
d154824d46dff5aece0cdb8e4c9df299058bacadbaf7fb16be8d9163ca2814bb krb5-1.15.1-55.el7_9.src.rpm