# CVE-2025-3931: yggdrasil: A flaw was found in Yggdrasil, which acts as a system broker, allowing the processes to communicate to other children...

CVE-2025-3931 is fixed in 2 products on 1 platform, first by RHSA-2025:7592, released May 14, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-3931
- Priority: High
- CVSS: 7.8 (important)
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 14, 2025

## Description

A flaw was found in Yggdrasil, which acts as a system broker, allowing the processes to communicate to other children's "worker" processes through the DBus component. Yggdrasil creates a DBus method to dispatch messages to workers. However, it misses authentication and authorization checks, allowing every system user to call it. One available Yggdrasil worker acts as a package manager with capabilities to create and enable new repositories and install or remove packages.  This flaw allows an attacker with access to the system to leverage the lack of authentication on the dispatch message to force the Yggdrasil worker to install arbitrary RPM packages. This issue results in local privilege escalation, enabling the attacker to access and modify sensitive system data.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | yggdrasil RHEL 10 | 0.4.5-3.el10_0 | [RHSA-2025:7592](https://patchblox.com/security/data/fix/linux/rhsa-2025-7592.md) | May 14, 2025 |
| Linux | yggdrasil almalinux 10 | 0.4.5-3.el10_0 | [ALSA-2025:7592](https://patchblox.com/security/data/fix/linux/alsa-2025-7592.md) | May 14, 2025 |
| Linux | yggdrasil ol 10 | 0:0.4.5-3.el10_0 | [ELSA-2025-7592](https://patchblox.com/security/data/fix/linux/elsa-2025-7592.md) | Jun 27, 2025 |
| Linux | yggdrasil rocky 10 | 0:0.4.5-3.el10_0 | [RLSA-2025:7592](https://patchblox.com/security/data/fix/linux/rlsa-2025-7592.md) | Oct 3, 2025 |
| Linux | yggdrasil-devel almalinux 10 | 0.4.5-3.el10_0 | [ALSA-2025:7592](https://patchblox.com/security/data/fix/linux/alsa-2025-7592.md) | May 14, 2025 |
| Linux | yggdrasil-devel ol 10 | 0:0.4.5-3.el10_0 | [ELSA-2025-7592](https://patchblox.com/security/data/fix/linux/elsa-2025-7592.md) | Jun 27, 2025 |

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Data as of 2026-11-08T13:06:02Z 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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