{"id":"CVE-2026-43629","title":"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…","summary":"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…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-190","CWE-787"],"vendor":"ggml","product":"llama.cpp","affected":["llama.cpp >= b4882, <= b9058"],"published":"2026-08-06","updated":"2026-09-21","sourceUpdated":"2026-09-21T18:11:47.567","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-43629","references":[{"url":"https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/llama-cpp-b4882-b9058-buffer-overflow-in-kv-cache-state-restore","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00619,"epssPercentile":0.47982,"ingestedAt":"2026-09-21T18:50:57.544Z","slug":"CVE-2026-43629","body":"## Overview\n\nllama.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.\n\n## Affected\n\n- `llama.cpp >= b4882, <= b9058`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}