# CVE-2026-34155: rauc: RAUC controls the update process on embedded Linux systems

CVE-2026-34155 is fixed in 4 products on 1 platform, first by FEDORA-2026-F0293B845E, released March 30, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-34155
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 30, 2026

## Description

RAUC controls the update process on embedded Linux systems. Prior to version 1.15.2, RAUC bundles using the 'plain' format exceeding a payload size of 2 GiB cause an integer overflow which results in a signature which covers only the first few bytes of the payload. Given such a bundle with a legitimate signature, an attacker can modify the part of the payload which is not covered by the signature. This issue has been patched in version 1.15.2.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rauc Debian 13.5 (trixie) | 1.13-3+deb13u1 | [DEBIAN-CVE-2026-34155](https://patchblox.com/security/data/fix/linux/debian-cve-2026-34155.md) | Mar 31, 2026 |
| Linux | rauc Debian 14 | 1.15.2-1 | [DEBIAN-CVE-2026-34155](https://patchblox.com/security/data/fix/linux/debian-cve-2026-34155.md) | Mar 31, 2026 |
| Linux | rauc Fedora 43 | 1.15.2-1.fc43 | [FEDORA-2026-F0293B845E](https://patchblox.com/security/data/fix/linux/fedora-2026-f0293b845e.md) | Mar 30, 2026 |
| Linux | rauc-debuginfo Fedora 43 | 1.15.2-1.fc43 | [FEDORA-2026-F0293B845E](https://patchblox.com/security/data/fix/linux/fedora-2026-f0293b845e.md) | Mar 30, 2026 |
| Linux | rauc-debugsource Fedora 43 | 1.15.2-1.fc43 | [FEDORA-2026-F0293B845E](https://patchblox.com/security/data/fix/linux/fedora-2026-f0293b845e.md) | Mar 30, 2026 |
| Linux | rauc-doc Fedora 43 | 1.15.2-1.fc43 | [FEDORA-2026-F0293B845E](https://patchblox.com/security/data/fix/linux/fedora-2026-f0293b845e.md) | Mar 30, 2026 |

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Data as of 2026-11-08T19:12:23Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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