AGL agl-service-can-low-level contains a stack buffer overflow in the uds-c library. The senddiagnosticrequest function in uds.c allocates a 6-byte stack buffer (MAXDIAGNOSTICPAYLOADSIZE=6) but copies up to 7 bytes (MAXUDSREQUESTPAYLOADLENGTH=7) via memcpy at an offset of 1+pidlength (2-3 bytes), resulting in 1-4 bytes of controlled stack overflow. The payloadlength field (uint8t) 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.