Memory Corruption Vulnerability in llama.cpp by ggml-org
CVE-2026-21869

8.8HIGH

Key Information:

Vendor

Ggml-org

Status
Llama.cpp
Vendor
CVE Published:
7 January 2026

What is CVE-2026-21869?

The llama.cpp library, which serves as an inference engine for various large language models, contains a vulnerability that arises from improper validation of the 'n_discard' parameter parsed from JSON input. If a negative value is provided, it results in out-of-bounds memory writes during token evaluation, potentially leading to process crashes or granting remote code execution capabilities. As of now, there is no available fix for this issue.

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Affected Version(s)

llama.cpp <= 55d4206c8

References

https://github.com/ggml-org/llama.cpp/security/advisories...
x_refsource_CONFIRM

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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