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RAUC: Improper Signing of Plain Bundles Exceeding 2 GiB

Type: advisorySources: OSV

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.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-34155
Confirmed fixed CVEs
Not specified
Updated in this feed
8 Nov 2026, 01:15 UTC · Revision 1

Source evidence

RAUC: Improper Signing of Plain Bundles Exceeding 2 GiB

core-osv · Original source

Published 31 Mar 2026, 13:28 UTC

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.

osv:CVE-2026-34155
Complete source record
{
  "id": "e0c225214dcc78d784ebd9bb6973246b59a5861b6bae60e3dbe98652d5e43f03",
  "url": "https://osv.dev/vulnerability/CVE-2026-34155",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "RAUC: Improper Signing of Plain Bundles Exceeding 2 GiB",
    "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 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.",
    "evidence": "osv:CVE-2026-34155",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-34155",
      "aliases": [
        "CVE-2026-34155",
        "GHSA-6hj7-q844-m2hx"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/rauc/rauc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4fb7c798d6ae412344fb8f8d310d773046af3441"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.15.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "4fb7c798d6ae412344fb8f8d310d773046af3441"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "4fb7c798d6ae412344fb8f8d310d773046af3441"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.15.2"
                  },
                  {
                    "cpe": "cpe:2.3:a:pengutronix:rauc:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.15.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.15.1",
            "v1.15",
            "v1.14",
            "v1.13",
            "v1.12",
            "v1.11.1",
            "v1.11",
            "v1.10.1",
            "v1.10",
            "v1.9",
            "v1.8",
            "v1.7",
            "v1.6",
            "v1.5.1",
            "v1.5",
            "v1.4",
            "v1.3",
            "v1.2",
            "v1.1",
            "v1.0",
            "v1.0-rc1",
            "v0.4",
            "v0.3",
            "v0.2",
            "v0.1.1",
            "v0.1",
            "v0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34155.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.535958214Z",
      "provider": "osv",
      "references": [
        "https://github.com/rauc/rauc/releases/tag/v1.15.2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34155.json",
        "https://github.com/rauc/rauc/security/advisories/GHSA-6hj7-q844-m2hx",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-34155",
        "https://github.com/rauc/rauc/commit/4fb7c798d6ae412344fb8f8d310d773046af3441"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-196",
          "CWE-347"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34155.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-34155",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521258,
  "published_at": "2026-03-31T13:28:14.863+00:00"
}