mod_md: Apache HTTP Server: mod_md (ACME), unintended retry intervals

An integer overflow flaw has been discovered in the Apache HTTP server. The integer overflow in the case of failed ACME certificate renewal leads, after a number of failures 30 days in default configurations, to the backoff timer becoming 0. Attempts to renew the certificate then are repeated...

CVE-2025-55753

CVE-2025-55753 affects Apache HTTP Server (2.4.30–2.4.65). The issue is an integer overflow during failed ACME certificate renewals that, after ~30 days in default configs, causes the backoff timer to become 0. Thereafter, renewal attempts occur repeatedly without delays until success, potentiall...