Updated: 2025-12-22 02:47:23.513767
Description:
An 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 without delays until it succeeds. This issue affects Apache HTTP Server: from 2.4.30 before 2.4.66. Users are recommended to upgrade to version 2.4.66, which fixes the issue.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | NONE | 0.0 |
| CVSS Version 3.x | HIGH | 7.5 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| AlmaLinux 9.2 ESU | mod_md | 2.4.19 | 7.5 | HIGH | Released | CLSA-2025:1767026442 | 2025-12-29 17:05:15 | |
| AlmaLinux 9.2 ESU | httpd | 2.4.53 | 7.5 | HIGH | In Testing | 2025-12-24 12:48:34 | ||
| CentOS 8.4 ELS | httpd | 2.4.37 | 7.5 | HIGH | Not Vulnerable | 2026-01-05 20:08:18 | ||
| CentOS 8.5 ELS | httpd | 2.4.37 | 7.5 | HIGH | Not Vulnerable | 2026-01-05 20:08:20 | ||
| CentOS Stream 8 ELS | httpd | 2.4.37 | 7.5 | HIGH | In Testing | 2025-12-25 14:34:49 | ||
| TuxCare 9.6 ESU | httpd | 2.4.62 | 7.5 | HIGH | Not Vulnerable | 2025-12-29 17:05:21 | ||
| TuxCare 9.6 ESU | mod_md | 2.4.26 | 7.5 | HIGH | Released | CLSA-2026:1767629031 | 2026-01-05 20:08:09 |