CVE-2026-44905

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Source

https://cve.org/CVERecord?id=CVE-2026-44905

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44905.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-44905

Aliases

GHSA-q9fq-3rx9-7xcv

Published

2026-05-26T21:18:33Z

Modified

2026-08-12T16:24:33Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

Vanetza: Remote Denial of Service via Uncaught OER Encoding Exception in Cryptographic Verification

Details

Vanetza is an open-source implementation of the ETSI C-ITS protocol suite. In 26.02 and earlier, a denial-of-service vulnerability was identified in the cryptographic verification pipeline of Vanetza. When processing incoming V2X messages, the ASN.1 decoder accepts the structure as syntactically valid. However, this reveals a logic-based protocol failure where semantic constraints on specific fields are only strictly enforced during OER re-encoding. Specifically, if a crafted packet contains a certificate where the Psid (Provider Service Identifier) sub-type violates subtype constraints (e.g., out-of-range or invalid CHOICE variant), it is accepted during initial parsing, where subtype constraints are not enforced. Later, when StraightVerifyService attempts to calculate a message hash for cryptographic verification, it must re-encode the signing certificate. The underlying ASN.1 wrapper (asn1c_wrapper.cpp) detects the semantic violation during encoding and raises a std::runtime_error. This exception is not caught within the encoding path and propagates to std::terminate, resulting in immediate process termination. This vulnerability is fixed with commit e1a2e2709210d309458c3d77f98d50dec26c0df0.

Database specific

{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-248"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44905.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "fixed":  "e1a2e2709210d309458c3d77f98d50dec26c0df0"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/riebl/vanetza

Affected ranges

Type

GIT

Repo

https://github.com/riebl/vanetza

Events

Introduced

Fixed

e1a2e2709210d309458c3d77f98d50dec26c0df0

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "last_affected":  "26.02"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v24.*

v24.10

v25.*

v25.06

v26.*

v26.02

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44905.json"

vanir_signatures

[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "169467805809650100907254097227535752772",
                "14041500191709272601141769165788347043",
                "200498007955823437206347493676005167514",
                "303546908535609357706725288682390875012",
                "222431100608473746886292800090134048161",
                "58442767986675785543773197795781573982",
                "318994315303756853649180777306688923296"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-44905-61e6ee49",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/riebl/vanetza/commit/e1a2e2709210d309458c3d77f98d50dec26c0df0",
        "target":  {
            "file":  "vanetza/security/straight_verify_service.cpp"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "216969328075873767355756843707141070872",
            "length":  4405
        },
        "id":  "CVE-2026-44905-fe516727",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/riebl/vanetza/commit/e1a2e2709210d309458c3d77f98d50dec26c0df0",
        "target":  {
            "file":  "vanetza/security/straight_verify_service.cpp",
            "function":  "StraightVerifyService::verify"
        }
    }
]

vanir_signatures_modified

"2026-08-12T16:24:33Z"