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llama.cpp Android CVE-2026-70639

| EUVDEUVD-2026-54278 MEDIUM
NULL Pointer Dereference (CWE-476)
2026-08-06 disclosure@vulncheck.com GHSA-6xfh-c5w2-8vqf
6.8
CVSS 4.0 · Vendor: vulncheck
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Severity by source

Vendor (vulncheck) PRIMARY
6.8 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
5.5 MEDIUM

Local delivery of crafted model file required (AV:L); user must load the file (UI:R); no authentication needed (PR:N); impact is application crash only, no data exposure (C:N/I:N/A:H).

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
5.5 MEDIUM
qualitative

Primary rating from Vendor (vulncheck).

CVSS VectorVendor: vulncheck

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

3
Source Code Evidence Fetched
Aug 06, 2026 - 23:19 vuln.today
Analysis Generated
Aug 06, 2026 - 23:19 vuln.today
CVE Published
Aug 06, 2026 - 22:18 cve.org
MEDIUM 6.8

DescriptionCVE.org

llama.cpp builds b1886 through b7445 contain a null pointer dereference vulnerability in the LLaMA-Android JNI wrapper where the bench_1model() function fails to validate the model context pointer before dereferencing it. Attackers can supply a malicious, corrupt, or truncated model file to trigger a null context condition, causing a SIGSEGV crash that terminates the Android application process and results in denial of service.

AnalysisAI

Null pointer dereference in the llama.cpp LLaMA-Android JNI wrapper's bench_1model() function allows denial of service via a crafted model file. Builds b1886 through b7445 (packaged releases 0.9.0-0.17.1) are affected; the function skips null validation on the model context pointer before dereferencing it, so supplying a malformed or truncated GGUF model file triggers a SIGSEGV that terminates the Android application process. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Vulnerability AssessmentAI

Exploitation Exploitation requires the following specific conditions: (1) the target application uses the llama.cpp Android JNI wrapper and invokes the bench_1model() benchmarking function - applications that use only inference paths and never call bench_1model() are not affected; (2) the attacker can deliver a malformed, corrupt, or truncated GGUF model file to the Android device's accessible storage; (3) the user must interact to load the malicious model (CVSS UI:P confirms this requirement). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N) scores 6.8, reflecting a local attack requiring user interaction with no confidentiality or integrity impact - only high availability impact to the vulnerable system. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to llama.cpp build b7446 or later, available at https://github.com/ggml-org/llama.cpp/releases/tag/b7446 - this is the vendor-released patched build. … Detailed patch versions, workarounds, and compensating controls in full report.

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Vendor StatusVendor

SUSE

Severity: Moderate

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CVE-2026-70639 vulnerability details – vuln.today

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