# DSA-5218-1: zlib security update

DSA-5218-1, released August 25, 2022, fixes 1 CVE in zlib (version 1:1.2.11.dfsg-2+deb11u2). 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-5218-1
- Platform: Linux
- Released: Aug 25, 2022
- Priority: High (Closes CVE-2022-37434, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2022-37434

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [zlib](https://patchblox.com/security/data/product/linux/zlib.md) | Debian 11.6 (bullseye) | 1:1.2.11.dfsg-2+deb11u2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2022-37434](https://patchblox.com/security/data/cve/CVE-2022-37434.md) | High | zlib: The zlib packages provide a general-purpose lossless data compression library that is used by many different programs... | 9.8 | 0.1924 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo