CVE-2026-121997
HIGH
NVD
CVSS Score
8.1
Severity
HIGH
Published
Nov 05, 2026
Vendor
unknown
Description
A heap buffer overflow in gdbserver's QTDPsrc packet handler allows an unauthenticated remote attacker to achieve native code execution in the gdbserver process. The vulnerability results from a mismatch between a packet's declared source length and the actual data length, causing hex2bin to write beyond the allocated heap buffer.