# CVE-2026-41054: Missing exit out of permission check in haveged could lead to root exploit

CVE-2026-41054 is fixed in 2 products on 1 platform, first by haveged 1.9.14-1ubuntu1+esm1~22.04.1, released May 20, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-41054
- Priority: High
- CVSS: 7.8 (Important)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 20, 2026
- Weakness: Authentication Bypass by Primary Weakness
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41054

## Description

In `src/havegecmd.c`, the `socket_handler` function performs a credential check on the abstract UNIX socket (`\0/sys/entropy/haveged`). However, while it detects if the connecting user is not root (`cred.uid != 0`) and prepares a negative acknowledgement (`ASCII_NAK`), it **fails to stop execution**. The code proceeds to the `switch` statement, allowing any local unprivileged user to execute privileged commands such as `MAGIC_CHROOT`.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | haveged Debian 12.15 (bookworm) | 1.9.14-1+deb12u1 | [DEBIAN-CVE-2026-41054](https://patchblox.com/security/data/fix/linux/debian-cve-2026-41054.md) | May 27, 2026 |
| Linux | haveged Debian 13.5 (trixie) | 1.9.19-12+deb13u1 | [DEBIAN-CVE-2026-41054](https://patchblox.com/security/data/fix/linux/debian-cve-2026-41054.md) | May 27, 2026 |
| Linux | haveged Debian 14 | 1.9.21-1 | [DEBIAN-CVE-2026-41054](https://patchblox.com/security/data/fix/linux/debian-cve-2026-41054.md) | May 27, 2026 |
| Linux | haveged Ubuntu 22.04.1 LTS (jammy) | 1.9.14-1ubuntu1+esm1~22.04.1 | [haveged 1.9.14-1ubuntu1+esm1~22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-haveged-1.9.14-1ubuntu1-esm1-22.04.1.md) | May 20, 2026 |
| Linux | haveged Ubuntu 24.04.5 LTS (noble) | 1.9.14-1ubuntu2+esm1~24.04.1 | [haveged 1.9.14-1ubuntu2+esm1~24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-haveged-1.9.14-1ubuntu2-esm1-24.04.1.md) | May 20, 2026 |
| Linux | haveged Ubuntu 25.10 (questing) | 1.9.19-12+deb13u1build0.25.10.1 | [haveged 1.9.19-12+deb13u1build0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-haveged-1.9.19-12-deb13u1build0.25.10.1.md) | May 20, 2026 |
| Linux | haveged Ubuntu 26.04.1 LTS (resolute) | 1.9.19-14ubuntu0.1 | [haveged 1.9.19-14ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-haveged-1.9.19-14ubuntu0.1.md) | May 20, 2026 |
| Linux | haveged opensuse-leap 16.0 | 1.9.19-bp160.2.1 | [OPENSUSE-SU-2026:21958-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21958-1.md) | Sep 24, 2026 |
| Linux | libhavege2 Ubuntu 22.04.1 LTS (jammy) | 1.9.14-1ubuntu1+esm1~22.04.1 | [libhavege2 1.9.14-1ubuntu1+esm1~22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libhavege2-1.9.14-1ubuntu1-esm1-22.04.1.md) | May 20, 2026 |
| Linux | libhavege2 Ubuntu 24.04.5 LTS (noble) | 1.9.14-1ubuntu2+esm1~24.04.1 | [libhavege2 1.9.14-1ubuntu2+esm1~24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libhavege2-1.9.14-1ubuntu2-esm1-24.04.1.md) | May 20, 2026 |
| Linux | libhavege2 Ubuntu 25.10 (questing) | 1.9.19-12+deb13u1build0.25.10.1 | [libhavege2 1.9.19-12+deb13u1build0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libhavege2-1.9.19-12-deb13u1build0.25.10.1.md) | May 20, 2026 |
| Linux | libhavege2 Ubuntu 26.04.1 LTS (resolute) | 1.9.19-14ubuntu0.1 | [libhavege2 1.9.19-14ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libhavege2-1.9.19-14ubuntu0.1.md) | May 20, 2026 |

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Data as of 2026-11-10T01:44:33Z 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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