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CVE-2026-43627

CVE-2026-43627 · llama.cpp b1283–b9058 Integer Overflow in llama_batch_init() Function

This page contains facts from public vulnerability sources. Check the original advisory before updating.

llama.cpp builds b1283 through b9058 contain an integer overflow vulnerability in the llama_batch_init() function where unchecked multiplications in malloc() calls can wrap past INT32_MAX when computing allocation sizes. Attackers can pass specially crafted parameters to trigger integer overflow, causing heap corruption and potentially achieving arbitrary code execution through subsequent batch operations that write past allocated buffer boundaries.

CVSS 8.5 · High · EPSS 0.2%

Published
Updated

Stack: system

Affected products and versions

  • llama.cpp

    Versions
    • ≥ b1283, ≤ b9058: Affected (custom)
    • ≥ 0.4.0, ≤ 0.17.1: Affected (semver)

    No fix published

  • llama.cpp Debian:14

    Versions
    • 10108+dfsg-1
    • 10108+dfsg1-1
    • 10108+dfsg1-2
    • 10192+dfsg-1
    • 10192+dfsg-2
    • 10192+dfsg-2~exp1
    • 10271+dfsg-1
    • 10344+dfsg-1
    • 10438+dfsg-1
    • 1:0.1.2+dfsg-1~exp1
    • 1:0.2.0+dfsg1-1
    • 1:0.2.0+dfsg1-1~exp1
    • 1:0.4.0+dfsg-1
    • 1:0.4.1+dfsg-1
    • 1:0.5.0+dfsg-1
    • 1:0.5.0+dfsg-2
    • 1:0.6.0+dfsg-1
    • 1:0.6.0+dfsg-2
    • 1:0.7.0+dfsg-1
    • 1:0.7.0+dfsg-2
    • 5151+dfsg-1~exp2
    • 5151+dfsg-1~exp3
    • 5318+dfsg-1
    • 5318+dfsg-2
    • 5713+dfsg-1
    • 5760+dfsg-1
    • 5760+dfsg-2
    • 5760+dfsg-3
    • 5760+dfsg-4
    • 5882+dfsg-1
    • 5882+dfsg-2
    • 5882+dfsg-3
    • 5882+dfsg-3~exp1
    • 5882+dfsg-3~exp2
    • 5882+dfsg-3~exp3
    • 5882+dfsg-4
    • 6641+dfsg-1
    • 6641+dfsg-2
    • 6641+dfsg-3
    • 7593+dfsg-1
    • 7593+dfsg-2
    • 7593+dfsg-3
    • 7965+dfsg-1
    • 8064+dfsg-1
    • 8064+dfsg-2
    • 8461+dfsg-1
    • 8611+dfsg-1
    • 8681+dfsg-1
    • 8870+dfsg-1
    • 8941+dfsg-1
    • 9009+dfsg-1
    • 9071+dfsg-1
    • 9190+dfsg-1
    • 9413+dfsg-1
    • 9555+dfsg-1
    • 9601+dfsg-1
    • 9721+dfsg-1
    • 9895+dfsg-1
    • 9895+dfsg-2
    • 9895+dfsg-3
    • 9951+dfsg-1
    • 9951+dfsg-2
    • 9951+dfsg-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • llama.cpp Ubuntu:26.10

    Versions
    • 8681+dfsg-1
    • 9721+dfsg-1ubuntu1
    • 10438+dfsg-1
    • 10438+dfsg-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • llama.cpp Ubuntu:26.04:LTS

    Versions
    • 5882+dfsg-2
    • 8064+dfsg-1ubuntu1
    • 8681+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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