llama.cpp b4882–b9058 Buffer Overflow in KV Cache State Restore
At a glance
Severity
CRITICAL 9.2
EPSS
EPSS 0.70 % · percentile 53 (2026-10-28)
State
PUBLISHED
Published
Updated
Assigner
VulnCheck
NVD status
Analyzed
Description
llama.cpp builds b4882 through b9058 contain a heap buffer overflow vulnerability in the KV cache state restore path where the state_read_data() function computes write size without overflow checking, allowing attackers with write access to the slot_save_path directory to corrupt heap memory. Attackers can craft malicious state files where cell_count multiplication overflows or exceeds tensor buffer allocation to write attacker-controlled bytes past buffer boundaries, potentially resulting in heap metadata corruption, model weight corruption, or arbitrary code execution via function pointer overwrite.
