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CVE-2026-70639

llama.cpp b1886–b7445 Null Pointer Dereference DoS via llama-android.cpp

MEDIUM
5.5
CVSS Score
Published: August 6, 2026 at 03:37 PM UTC
Updated: October 24, 2026 at 03:10 PM UTC
2 products affected across 2 vendorsLlama.cppLlama.cpp

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Llama.cpp· Ggml
95%
b1886 ≤ v ≤ b7445
Llama.cpp· Ggml Org
90%
0.9.0 ≤ v ≤ 0.17.1b1886 ≤ v ≤ b74450.9.0b1886
Vendor states this is fixed in 5c0d18881e0e9794c96b2602736b758bac9d9388 (unaffected)

References (4)

RelatedPatchThird Party Advisory
Source: [email protected]
https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches
Patch
Source: [email protected]
https://github.com/ggml-org/llama.cpp/commit/5c0d18881e0e9794c96b2602736b758bac9d9388
Release NotesPatchVendor Advisory
Source: [email protected]
https://github.com/ggml-org/llama.cpp/releases/tag/b7446
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/llama-cpp-b1886-b7445-null-pointer-dereference-dos-via-llama-android-cpp

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMVulnCheck
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-476

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