CVE-2026-54413

driftregion iso14229 through 0.9.0 contains an integer underflow and downstream out-of-bounds read in the Handle_0x27_SecurityAccess function in iso14229.c that allows a remote unauthenticated attacker to crash a UDS server and potentially read memory past the receive buffer by sending a single-byte 0x27 SecurityAccess request that follows any earlier well-formed 0x27 message.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://cwe.mitre.org/data/definitions/125.html
https://cwe.mitre.org/data/definitions/191.html
https://github.com/driftregion/iso14229
https://github.com/driftregion/iso14229/blob/main/iso14229.c#L1447

Configurations

No configuration.

History

No history.

Information

Published : 2026-06-14 18:17

Updated : 2026-08-10 12:17

NVD link : CVE-2026-54413

Mitre link : CVE-2026-54413

CVE.ORG link : CVE-2026-54413

JSON object : View

Products Affected

No product.

CWE

CWE-125

Out-of-bounds Read

CWE-191

Integer Underflow (Wrap or Wraparound)

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El gestor lee la subfunci\u00f3n SecurityAccess de recv_buf[1] sin verificar primero que recv_len sea al menos 2, luego calcula la longitud de los datos de la clave como la resta sin signo (uint16_t)(recv_len - UDS_0X27_REQ_BASE_LEN); cuando recv_len es igual a 1, el resultado sufre un desbordamiento negativo a 65535 y se pasa como args.len a la devoluci\u00f3n de llamada SecAccessValidateKey o SecAccessRequestSeed de la aplicaci\u00f3n, que t\u00edpicamente itera o copia esa cantidad de bytes del b\u00fafer de recepci\u00f3n de 4 KB. Cada otro gestor de subfunci\u00f3n UDS en la biblioteca (0x10, 0x11, 0x14, 0x19, 0x22, 0x23, 0x28 y otros) realiza una verificaci\u00f3n expl\u00edcita del l\u00edmite inferior de recv_len antes de la indexaci\u00f3n; Handle_0x27_SecurityAccess es la \u00fanica excepci\u00f3n. El gestor vulnerable es accesible a trav\u00e9s de los transportes CAN bus, OBD-II, ISO-TP y DoIP y est\u00e1 expuesto en la sesi\u00f3n de diagn\u00f3stico predeterminada sin autenticaci\u00f3n previa; las implementaciones en ECUs automotrices, controladores industriales y dispositivos IoT que incluyen iso14229 como su servidor UDS se ven afectadas."}], "lastModified": "2026-08-10T12:17:17.403", "sourceIdentifier": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c"}