What’s Vulnerable › Vulnerabilities

CVE-2026-34155: RAUC: Improper Signing of Plain Bundles Exceeding 2 GiB

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-31 · updated 2026-07-24
• Weakness: CWE-196

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.

Affected products

• rauc: before 1.15.2 — fixed in 1.15.2

How to fix

Upgrade to a fixed version: rauc 1.15.2. Check the vendor advisory for mitigations.

References

• https://github.com/rauc/rauc/commit/4fb7c798d6ae412344fb8f8d310d773046af3441
• https://github.com/rauc/rauc/releases/tag/v1.15.2
• https://github.com/rauc/rauc/security/advisories/GHSA-6hj7-q844-m2hx

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