# DSA-5376-1: apache2 security update

DSA-5376-1, released March 20, 2023, fixes 1 CVE in apache2 (version 2.4.56-1~deb11u1). 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/dsa-5376-1
- Platform: Linux
- Released: Mar 20, 2023
- Priority: High (Closes CVE-2006-20001, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2006-20001

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [apache2](https://patchblox.com/security/data/product/linux/apache2.md) | Debian 11.6 (bullseye) | 2.4.56-1~deb11u1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2006-20001](https://patchblox.com/security/data/cve/CVE-2006-20001.md) | High | apache2: A carefully crafted If: request header can cause a memory read, or write ofa single zero byte, in a pool (heap) memor... | 7.5 | 0.0358 |  |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo