CVE-2026-34155

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account, but needs a user to act. High risk of data tampering.

Exploit odds

0.1% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-03-31 14:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-07-24 22:10 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.1% in the next 30 days (EPSS).
• Severity: 7.2 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2026-03-31 14:16 UTC

Last modified

2026-07-24 22:10 UTC

Exploit probability

0.1% · EPSS, next 30 days

Weakness

CWE-196

Record status

Analyzed

Affected

• Pengutronix Rauc < 1.15.2

Attack profile CVSS 4.0 · 7.2

Attack vector

Network

Complexity

Low

Attack requirements

Present

Privileges needed

Low

User interaction

Passive

Confidentiality

Low

Integrity

High

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-34155.md and follow it. Check whether this project is affected by CVE-2026-34155. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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