Bug 2419140 (CVE-2025-55753) - CVE-2025-55753 mod_md: Apache HTTP Server: mod_md (ACME), unintended retry intervals
Summary: CVE-2025-55753 mod_md: Apache HTTP Server: mod_md (ACME), unintended retry in...
Keywords:
Status: NEW
Alias: CVE-2025-55753
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2420212 2420213
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-05 11:01 UTC by OSIDB Bzimport
Modified: 2026-02-04 12:22 UTC (History)
7 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2025:23732 0 None None None 2025-12-22 01:23:07 UTC
Red Hat Product Errata RHSA-2025:23738 0 None None None 2025-12-22 01:23:55 UTC
Red Hat Product Errata RHSA-2025:23739 0 None None None 2025-12-22 01:40:24 UTC
Red Hat Product Errata RHSA-2026:0009 0 None None None 2026-01-05 01:36:36 UTC
Red Hat Product Errata RHSA-2026:0010 0 None None None 2026-01-05 01:52:04 UTC
Red Hat Product Errata RHSA-2026:0011 0 None None None 2026-01-05 01:52:36 UTC
Red Hat Product Errata RHSA-2026:0012 0 None None None 2026-01-05 01:55:44 UTC
Red Hat Product Errata RHSA-2026:0029 0 None None None 2026-01-05 05:22:20 UTC
Red Hat Product Errata RHSA-2026:0030 0 None None None 2026-01-05 05:14:56 UTC
Red Hat Product Errata RHSA-2026:0092 0 None None None 2026-01-06 00:43:33 UTC
Red Hat Product Errata RHSA-2026:0093 0 None None None 2026-01-06 01:39:38 UTC
Red Hat Product Errata RHSA-2026:0094 0 None None None 2026-01-06 04:59:44 UTC

Description OSIDB Bzimport 2025-12-05 11:01:20 UTC 
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.
Comment 3 errata-xmlrpc 2025-12-22 01:23:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:23732 https://access.redhat.com/errata/RHSA-2025:23732
Comment 4 errata-xmlrpc 2025-12-22 01:23:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2025:23738 https://access.redhat.com/errata/RHSA-2025:23738
Comment 5 errata-xmlrpc 2025-12-22 01:40:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:23739 https://access.redhat.com/errata/RHSA-2025:23739
Comment 6 errata-xmlrpc 2026-01-05 01:36:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2026:0009 https://access.redhat.com/errata/RHSA-2026:0009
Comment 7 errata-xmlrpc 2026-01-05 01:52:02 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:0010 https://access.redhat.com/errata/RHSA-2026:0010
Comment 8 errata-xmlrpc 2026-01-05 01:52:34 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2026:0011 https://access.redhat.com/errata/RHSA-2026:0011
Comment 9 errata-xmlrpc 2026-01-05 01:55:43 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:0012 https://access.redhat.com/errata/RHSA-2026:0012
Comment 10 errata-xmlrpc 2026-01-05 05:14:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:0030 https://access.redhat.com/errata/RHSA-2026:0030
Comment 11 errata-xmlrpc 2026-01-05 05:22:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:0029 https://access.redhat.com/errata/RHSA-2026:0029
Comment 12 errata-xmlrpc 2026-01-06 00:43:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:0092 https://access.redhat.com/errata/RHSA-2026:0092
Comment 13 errata-xmlrpc 2026-01-06 01:39:36 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:0093 https://access.redhat.com/errata/RHSA-2026:0093
Comment 14 errata-xmlrpc 2026-01-06 04:59:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:0094 https://access.redhat.com/errata/RHSA-2026:0094
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