Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches
- https://www.vulncheck.com/advisories/llama-cpp-b4882-b9058-buffer-overflow-in-kv
FAQ
What is CVE-2026-43629?
CVE-2026-43629 is a vulnerability with a CVSS score of 8.1 (HIGH). 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,...
How severe is CVE-2026-43629?
CVE-2026-43629 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43629?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.