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highCVSS 8.1NVD status: Analyzed

CVE-2026-43629

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 attacke...

Componentllama.cpp
Severityhigh (CVSS 8.1)
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published (NVD)2026-08-06
Last modified2026-09-21
Affected versions
llama.cpp >= b4882, <= b9058
Fixed insee the vendor advisory
WeaknessCWE-190CWE-787
CISA KEVnot listed

NVD 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.

Does CVE-2026-43629 hit the version you run?Paste your docker-compose.yml, requirements.txt or package.json. The scanner checks your pinned versions against this CVE and every other one we track for llama.cpp.
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What to do

  • NVD lists no fixed version yet: follow the vendor advisory below and keep llama.cpp off the public internet until a fix ships.
  • Do not expose the component's API or UI to the internet without authentication in front of it.

Sources

Other llama.cpp CVEs

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CVE-2026-52132CVSS 7.5

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CVE-2026-52131CVSS 7.5

llama.cpp b5693 and before has a Reachable Assertion via the gguf_reader::read function.

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CVE-2026-52130CVSS 7.5

llama.cpp b5693 and before is vulnerable to Uncontrolled Recursion in common/json-schema-to-grammar.cpp, resulting in a denial of service.

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CVE-2026-78148CVSS 5.3

A vulnerability was determined in ggml-org llama.cpp bec4772f6. This affects the function rpc_server::graph_compute of the file ggml/src/ggm...

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