# DLA-4155-1: libapache2-mod-auth-openidc security update

DLA-4155-1, released May 8, 2025, fixes 1 CVE in libapache2-mod-auth-openidc (version 2.4.9.4-0+deb11u6). None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/dla-4155-1
- Platform: Linux
- Released: May 8, 2025
- Priority: High (Closes CVE-2025-3891, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2025-3891

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libapache2-mod-auth-openidc](https://patchblox.com/security/data/product/linux/libapache2-mod-auth-openidc.md) | Debian 11.6 (bullseye) | 2.4.9.4-0+deb11u6 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-3891](https://patchblox.com/security/data/cve/CVE-2025-3891.md) | High | apache2-mod_auth_openidc: This update for apache2-mod_auth_openidc fixes the following issues:  - Update to 2.4.17.1 (bsc#1248806 / PED-14130).... | 7.5 | 0.0160 |  |

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Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo