# CVE-2023-0056: haproxy: The haproxy packages provide a reliable, high-performance network load balancer for TCP and HTTP-based applications....

CVE-2023-0056 is fixed in 2 products on 1 platform, first by haproxy 2.0.29-0ubuntu1.1, released January 17, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-0056
- Priority: Routine
- CVSS: 6.5 (Moderate)
- EPSS: 0.0183
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 17, 2023

## Description

The haproxy packages provide a reliable, high-performance network load balancer for TCP and HTTP-based applications.  Security Fix(es):  * haproxy: segfault DoS (CVE-2023-0056)  * haproxy: request smuggling attack in HTTP/1 header parsing (CVE-2023-25725)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | haproxy Debian 11.6 (bullseye) | 2.2.9-2+deb11u4 | [DSA-5348-1](https://patchblox.com/security/data/fix/linux/dsa-5348-1.md) | Feb 14, 2023 |
| Linux | haproxy Debian 12.15 (bookworm) | 2.6.8-1 | [DEBIAN-CVE-2023-0056](https://patchblox.com/security/data/fix/linux/debian-cve-2023-0056.md) | Mar 23, 2023 |
| Linux | haproxy Debian 13.5 (trixie) | 2.6.8-1 | [DEBIAN-CVE-2023-0056](https://patchblox.com/security/data/fix/linux/debian-cve-2023-0056.md) | Mar 23, 2023 |
| Linux | haproxy Debian 14 | 2.6.8-1 | [DEBIAN-CVE-2023-0056](https://patchblox.com/security/data/fix/linux/debian-cve-2023-0056.md) | Mar 23, 2023 |
| Linux | haproxy RHEL 9 | 0:2.4.17-3.el9_1.2 | [RHSA-2023:1696](https://patchblox.com/security/data/fix/linux/rhsa-2023-1696.md) | Apr 11, 2023 |
| Linux | haproxy Ubuntu 20.04 LTS (focal) | 2.0.29-0ubuntu1.1 | [haproxy 2.0.29-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-haproxy-2.0.29-0ubuntu1.1.md) | Jan 17, 2023 |
| Linux | haproxy Ubuntu 22.04.1 LTS (jammy) | 2.4.18-0ubuntu1.1 | [haproxy 2.4.18-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-haproxy-2.4.18-0ubuntu1.1.md) | Jan 17, 2023 |
| Linux | haproxy almalinux 9 | 2.4.17-3.el9_1.2 | [ALSA-2023:1696](https://patchblox.com/security/data/fix/linux/alsa-2023-1696.md) | Apr 11, 2023 |
| Linux | haproxy ol 9 | 0:2.4.17-3.el9_1.2 | [ELSA-2023-1696](https://patchblox.com/security/data/fix/linux/elsa-2023-1696.md) | Apr 11, 2023 |
| Linux | vim-haproxy Ubuntu 20.04 LTS (focal) | 2.0.29-0ubuntu1.1 | [vim-haproxy 2.0.29-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-vim-haproxy-2.0.29-0ubuntu1.1.md) | Jan 17, 2023 |
| Linux | vim-haproxy Ubuntu 22.04.1 LTS (jammy) | 2.4.18-0ubuntu1.1 | [vim-haproxy 2.4.18-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-vim-haproxy-2.4.18-0ubuntu1.1.md) | Jan 17, 2023 |

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Data as of 2026-11-08T06:59:42Z 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

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