Description
llama.cpp is an inference of several LLM models in C/C++. Prior to version b8492, the RPC backend's deserialize_tensor() skips all bounds validation when a tensor's buffer field is 0. An unauthenticated attacker can read and write arbitrary process memory via crafted GRAPH_COMPUTE messages. Combined with pointer leaks from ALLOC_BUFFER/BUFFER_GET_BASE, this gives full ASLR bypass and remote code execution. No authentication required, just TCP access to the RPC server port. This issue has been patched in version b8492.
Published: 2026-04-01
Score: 9.8 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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History

Wed, 01 Apr 2026 23:45:00 +0000

Type Values Removed Values Added
Description llama.cpp is an inference of several LLM models in C/C++. Prior to version b8492, the RPC backend's deserialize_tensor() skips all bounds validation when a tensor's buffer field is 0. An unauthenticated attacker can read and write arbitrary process memory via crafted GRAPH_COMPUTE messages. Combined with pointer leaks from ALLOC_BUFFER/BUFFER_GET_BASE, this gives full ASLR bypass and remote code execution. No authentication required, just TCP access to the RPC server port. This issue has been patched in version b8492.
Title llama.cpp: Unauthenticated RCE via GRAPH_COMPUTE buffer=0 bypass in llama.cpp RPC backend
Weaknesses CWE-119
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-02T03:56:11.820Z

Reserved: 2026-03-25T20:12:04.197Z

Link: CVE-2026-34159

cve-icon Vulnrichment

Updated: 2026-04-01T19:07:52.812Z

cve-icon NVD

Status : Received

Published: 2026-04-01T18:16:29.687

Modified: 2026-04-01T18:16:29.687

Link: CVE-2026-34159

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses