vulnerability
Debian: CVE-2025-55753: apache2 -- security update
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:C/I:N/A:N) | Jan 12, 2026 | Jan 12, 2026 | Jan 26, 2026 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:C/I:N/A:N)
Published
Jan 12, 2026
Added
Jan 12, 2026
Modified
Jan 26, 2026
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.
Solution
debian-upgrade-apache2
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