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    CVE-2026-43628

    llama.cpp builds b3978 through b9058 contain an integer underflow and out-of-bounds read vulnerability in the DRY sampler that allows unauthenticated attackers to trigger a heap buffer underflow by sending a crafted HTTP request with dry_allowed_length set to INT32_MIN to the /v1/completions or /v1/chat/completions endpoints. Attackers can exploit this vulnerability to crash the server with SIGSEGV causing denial of service for all connected users, or corrupt token sampling probabilities by reading garbage values from memory before the allocated buffer.

    Published:Aug 6, 2026
    Last Modified:Aug 14, 2026
    EPS:Aug 6, 2026
    EPSS Score:0.00202
    CVSS Score:7.8

    Affected Products

    Vendor
    Ggml
    Product
    Llama.cpp
    Vendor
    Ggml-org
    Product
    Llama.cpp

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

    CVE-2026-52131 (CVSS 7.5) — llama.cpp b5693 and before has a Reachable Assertion via the gguf_reader::read function.…
    CVE-2026-52130 (CVSS 7.5) — llama.cpp b5693 and before is vulnerable to Uncontrolled Recursion in common/json-schema-to-grammar.cpp, resul…
    CVE-2026-52132 (CVSS 7.5) — llama.cpp through commit 97f06e9, when started with the --reranking flag, allows remote attackers to cause a d…
    CVE-2026-43632 (CVSS 9.2) — llama.cpp builds b7492 through the latest b9060 contains a use-after-free vulnerability in llama-server affect…
    CVE-2026-43631 (CVSS 9.2) — llama.cpp builds b7492 through the latest b9060 contains a use-after-free vulnerability in the vocab pointer o…
    CVE-2026-43630 (CVSS 6.3) — llama.cpp builds b5702 through b7653 contain an out-of-bounds read vulnerability in the recurrent memory state…
    CVE-2026-43629 (CVSS 9.2) — llama.cpp builds b4882 through b9058 contain a heap buffer overflow vulnerability in the KV cache state restor…
    CVE-2026-43627 (CVSS 8.5) — llama.cpp builds b1283 through b9058 contain an integer overflow vulnerability in the llama_batch_init() funct…
    CVE-2026-70640 (CVSS 7.3) — llama.cpp builds b1886 through b7445 contain a race condition use-after-free vulnerability in the LLaMA-Androi…
    CVE-2026-70639 (CVSS 6.8) — llama.cpp builds b1886 through b7445 contain a null pointer dereference vulnerability in the LLaMA-Android JNI…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High