I certificati interessati vanno rinnovati entro le ore 20 di oggi
In ogni caso riguardano solo i certificati dove è stato abilitato il DNS CAA
Incident Status
Security Issue
[Identified] Due to the 2020.02.29 CAA Rechecking Bug, we unfortunately need to revoke 2.6% of active Let’s Encrypt TLS/SSL certificates. We are in the process of notifying some Let's Encrypt users that their certificates will be revoked on 04 March 2020. Updates are available on our community forum community.letsencrypt.org/t/revoking-certain-certificates-on-march-4/114864
https://letsencrypt.org/caaproblem/
On February 29 2020, Let's Encrypt discovered a bug in how we recheck CAA records at issuance time. Details are described here. Unfortunately, this means we need to revoke the certificates that were affected by this bug. We're sending emails to everyone with an affected certificate. However, it's quite possible that your ACME client has already renewed your certificate automatically, and your new certificate doesn't have this problem.
[Identified] In order to complete revocations before the deadline of 2020-03-05 03:00 UTC, we are planning to start revoking affected certificates at 2020-03-04 20:00 UTC (3:00pm US EST). Please continue to renew and replace affected certificates in the meantime. If there are any changes to this start time, updates will be provided in this thread. Thank you all very much for your patience, understanding, and help as we work through this issue.
https://letsencrypt.status.io/