# DLA-4163-1: rubygems security update

DLA-4163-1, released May 12, 2025, fixes 1 CVE in rubygems (version 3.2.5-2+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/dla-4163-1
- Platform: Linux
- Released: May 12, 2025
- Priority: High (Closes CVE-2021-43809, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2021-43809

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [rubygems](https://patchblox.com/security/data/product/linux/rubygems.md) | Debian 11.6 (bullseye) | 3.2.5-2+deb11u1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-43809](https://patchblox.com/security/data/cve/CVE-2021-43809.md) | High | rubygem-bundler: This update for rubygem-bundler fixes the following issues:  - CVE-2021-43809: Fixed remote execution via Gemfile arg... | 7.5 | 0.0291 |  |

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Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo