---
id: CVE-2026-34155
title: RAUC controls the update process on embedded Linux systems
summary: >-
  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 fir…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-196
  - CWE-347
vendor: pengutronix
product: rauc
affected:
  - rauc < 1.15.2
patched:
  - rauc 1.15.2
published: '2026-03-31'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-34155'
references:
  - url: >-
      https://github.com/rauc/rauc/commit/4fb7c798d6ae412344fb8f8d310d773046af3441
    label: security-advisories@github.com
  - url: 'https://github.com/rauc/rauc/releases/tag/v1.15.2'
    label: security-advisories@github.com
  - url: 'https://github.com/rauc/rauc/security/advisories/GHSA-6hj7-q844-m2hx'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00229
epssPercentile: 0.12194
ingestedAt: '2026-07-24T22:40:25.415Z'
---

## Overview

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.

## Affected

- `rauc < 1.15.2`

## Remediation

Upgrade past the affected range:

- `rauc 1.15.2`