# DLA-3947-1: puma security update

DLA-3947-1, released November 6, 2024, fixes 1 CVE in puma (version 4.3.8-1+deb11u3). 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-3947-1
- Platform: Linux
- Released: Nov 6, 2024
- Priority: High (Closes CVE-2024-21647, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2024-21647

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [puma](https://patchblox.com/security/data/product/linux/puma.md) | Debian 11.6 (bullseye) | 4.3.8-1+deb11u3 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2024-21647](https://patchblox.com/security/data/cve/CVE-2024-21647.md) | High | rubygem-puma: This update for rubygem-puma fixes the following issues:  Update to version 5.6.9.  - CVE-2024-45614: improper header... | 7.5 | 0.0096 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo