EUVD-2026-54280
GHSA-vfpq-2xx5-4vrv
Severity by source
CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/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
Local vector for Android JNI-scoped attack; high complexity reflects race-win timing and heap spray precision required; no privileges needed, but user must trigger benchmark path.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/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
Lifecycle Timeline
3DescriptionCVE.org
llama.cpp builds b1886 through b7445 contain a race condition use-after-free vulnerability in the LLaMA-Android JNI wrapper where bench_1model() and free_1context() lack synchronization, allowing Thread A to operate on freed memory while Thread B concurrently frees the llama_context. Attackers can exploit this by performing heap spray with attacker-controlled data containing a fake vtable to hijack the vtable pointer at offset +0x30, causing llama_batch_allocr::clear() to dereference arbitrary memory and achieve remote code execution.
AnalysisAI
Remote code execution is achievable in llama.cpp's LLaMA-Android JNI wrapper (builds b1886 through b7445) by exploiting a race condition use-after-free between bench_1model() and free_1context(), which share the llama_context heap object without any synchronization primitive. An attacker who wins the race can perform a heap spray with a crafted fake vtable, overwriting the vtable pointer at offset +0x30 in llama_batch_allocr so that clear() dispatches to attacker-controlled memory, achieving code execution within the Android application process. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a target Android device running an application built with llama.cpp JNI wrapper builds b1886-b7445. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 7.3 (AV:L/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H) accurately reflects a constrained but impactful vulnerability. … 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, the vendor-released patch available at https://github.com/ggml-org/llama.cpp/releases/tag/b7446, which incorporates upstream commit 5c0d18881e0e9794c96b2602736b758bac9d9388. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all deployed Android applications and systems using llama.cpp builds b1886 through b7445 and document deployment scope and data sensitivity. …
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Same weakness CWE-362 – Race Condition
View allVendor StatusVendor
SUSE
Severity: ImportantShare
External POC / Exploit Code
Leaving vuln.today