CVE-2026-121994
HIGH
NVD
CVSS Score
8.8
Severity
HIGH
Published
Nov 05, 2026
Vendor
unknown
Description
A stack buffer overflow in the GDB client's remote protocol handler allows an attacker-controlled debug target to execute arbitrary code in the GDB process. The vulnerability exists in fetch_register_using_p, which decodes a stub's register reply into an alloca-sized buffer without bounding writes by the register width.