Heap-based Buffer Overflow Affecting llama.cpp package, versions <8461+dfsg-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-LLAMACPP-15669304
- published16 Mar 2026
- disclosed12 Mar 2026
Introduced: 12 Mar 2026
CVE-2026-27940 (opens in a new tab)How to fix?
Upgrade Debian:unstable llama.cpp to version 8461+dfsg-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream llama.cpp package and not the llama.cpp package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
llama.cpp is an inference of several LLM models in C/C++. Prior to b8146, the gguf_init_from_file_impl() in gguf.cpp is vulnerable to an Integer overflow, leading to an undersized heap allocation. Using the subsequent fread() writes 528+ bytes of attacker-controlled data past the buffer boundary. This is a bypass of a similar bug in the same file - CVE-2025-53630, but the fix overlooked some areas. This vulnerability is fixed in b8146.