A new nginx package with the fix for the CVE-2021-23017 within CentOS 6 extended lifecycle support has been scheduled for gradual rollout from our production repository.
Rollout slot: 1
Rolled out to: 1%
ETA for 100% rollout: June, 7
yum update nginx*
yum update nginx* --enablerepo=ELS6-rollout-1-bypass