CVE-2026-34155
RAUC: Improper Signing of Plain Bundles Exceeding 2 GiB
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Passive
What an attacker can affect
- Confidentiality
- Low
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
7.2
RAUC: Improper Signing of Plain Bundles Exceeding 2 GiB
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.
- Record
CVE-2026-34155- CVSS 4.0
- 7.2 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:H/SI:H/SA:H - Weakness
- CWE-196, CWE-347
- Updated
- 2026-11-02
EUVDEUVD-2026-17413
7.2
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.
- Record
EUVD-2026-17413- CVSS 4.0
- 7.2 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:H/SI:H/SA:H - Updated
- 2026-11-02
NVD
7.2
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.
- Record
CVE-2026-34155- CVSS 4.0
- 7.2 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-196, CWE-347
- Updated
- 2026-11-02
OSV
7.2
RAUC: Improper Signing of Plain Bundles Exceeding 2 GiB
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.
- Record
CVE-2026-34155- CVSS 4.0
- 7.2 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:H/SI:H/SA:H - Weakness
- CWE-196, CWE-347
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-34155
5.3
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.
- Record
DEBIAN-CVE-2026-34155- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-34155
7.2
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.
- Record
UBUNTU-CVE-2026-34155- CVSS 4.0
- 7.2 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:H/SI:H/SA:H - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
raucDebian:12 |
All versions, plus listed versions 1.10.1-11.10.1-21.11-11.11.3-11.11.3-2 Show 10 moreShow less1.12-11.13-11.13-21.13-31.14-11.15-11.15.1-11.15.2-11.8-21.9-1 |
None known |
raucDebian:13 |
before 1.13-3+deb13u1, plus listed versions 1.13-3 |
1.13-3+deb13u1 |
raucDebian:14 |
before 1.15.2-1, plus listed versions 1.13-31.14-11.15-11.15.1-1 |
1.15.2-1 |
raucUbuntu:20.04:LTS |
All versions, plus listed versions 1.1-21.2-1 |
None known |
raucUbuntu:22.04:LTS |
All versions, plus listed versions 1.5.1-11.5.1-1build11.6-1 |
None known |
raucUbuntu:24.04:LTS |
All versions, plus listed versions 1.10.1-11.10.1-21.11-11.11-1build31.11.3-2 |
None known |
raucUbuntu:25.10 |
All versions, plus listed versions 1.13-11.13-3 |
None known |
raucUbuntu:26.10 |
All versions, plus listed versions 1.15.1-11.15.2-11.15.2-1ubuntu1 |
None known |
raucUbuntu:26.04:LTS |
All versions, plus listed versions 1.13-31.14-11.15-11.15.1-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-34155 is a high vulnerability (CVSS 7.2) in Pengutronix Rauc, published March 31, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.15%, the 3rd percentile. Fixed in rauc 1.13-3+deb13u1.
References
github.com/rauc/rauc/security/advisories/GHSA-6hj7-q844-m2hx
github.com/rauc/rauc/commit/4fb7c798d6ae412344fb8f8d310d773046af3441
github.com/rauc/rauc/releases/tag/v1.15.2
github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34155.json
nvd.nist.gov/vuln/detail/CVE-2026-34155
security-tracker.debian.org/tracker/CVE-2026-34155
ubuntu.com/security/CVE-2026-34155
cve.org/CVERecord?id=CVE-2026-34155