High severity7.8NVD Advisory· Published Mar 12, 2026· Updated Apr 28, 2026
CVE-2026-27940
CVE-2026-27940
Description
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.
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Affected products
2Patches
Vulnerability mechanics
References
1- github.com/ggml-org/llama.cpp/security/advisories/GHSA-3p4r-fq3f-q74vnvdExploitVendor Advisory
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