CVE Catalog

CVE-2026-42485

High
Published: Translated: NVD NIST

Summary

AGL agl-service-can-low-level contains a stack buffer overflow in the uds-c library. The send_diagnostic_request function allocates a 6-byte stack buffer but copies up to 7 bytes, leading to controlled buffer overflow.

Risk Assessment

On 32-bit ARM automotive ECUs without stack canaries, this can lead to return address overwrite and remote code execution (RCE), posing a serious security threat to the system.

Recommendation

It is recommended to implement bounds checking for the payload_length field and update the uds-c library to prevent buffer overflow.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS