CVE-2026-42485 POC (Proof-of-Concept)

AGL agl-service-can-low-level contains a stack buffer overflow in the uds-c library. The send_diagnostic_request function in uds.c allocates a 6-byte stack buffer (MAX_DIAGNOSTIC_PAYLOAD_SIZE=6) but copies up to 7 bytes (MAX_UDS_REQUEST_PAYLOAD_LENGTH=7) via memcpy at an offset of 1+pid_length (2-3 bytes), resulting in 1-4 bytes of controlled stack overflow. The payload_length field (uint8_t) has no bounds check against the destination buffer. On 32-bit ARM automotive ECUs without stack canaries, this can lead to return address overwrite and RCE.

Published: 2026-05-01

CVSS: 7.5

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Download CVE-2026-42485 POC (Proof-of-Concept) here:

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https://hokyo.gr/poc-437-cve-2025-71252/

https://hokyo.gr/poc-549-cve-2026-20188/

https://hokyo.gr/poc-203-cve-2026-7711/

https://hokyo.gr/poc-863-cve-2026-43329/

https://hokyo.gr/poc-481-cve-2026-43158/