CVE-2026-34155
CVE-2026-34155 is a medium-severity vulnerability in Pengutronix Rauc with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-196.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- CVSS v4: 7.2
- EPSS exploit prediction: 0% (4th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-17413
- Weakness: CWE-196
- Affected product: Pengutronix Rauc
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-34155?
- 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.
- How severe is CVE-2026-34155?
- CVE-2026-34155 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
- Is CVE-2026-34155 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-34155?
- CVE-2026-34155 affects Pengutronix Rauc. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-34155?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-34155 have an EU (EUVD) identifier?
- Yes. CVE-2026-34155 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17413.
- When was CVE-2026-34155 published?
- CVE-2026-34155 was published on 2026-03-31 and last updated on 2026-06-17.
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
Affected products (1)
- cpe:2.3:a:pengutronix:rauc:*:*:*:*:*:*:*:*
More vulnerabilities in Pengutronix Rauc
- CVE-2020-25860 — Medium (CVSS 6.6): The install.c module in the Pengutronix RAUC update client prior to version 1.5 has a Time-of-Check Time-of-Use…
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Other CWE-196 vulnerabilities
- CVE-2026-14454: Imager versions before 1.033 for Perl treat unsigned EXIF IFD entry counts as signed. Imager mishandled large EXIF IFD…