CVE-2026-70639

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Los atacantes pueden suministrar un archivo de modelo malicioso, corrupto o truncado para activar una condici\u00f3n de contexto nulo, causando un fallo SIGSEGV que termina el proceso de la aplicaci\u00f3n de Android y resulta en denegaci\u00f3n de servicio."}], "id": "CVE-2026-70639", "lastModified": "2026-10-29T21:17:31.037", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-70639", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-07T15:54:20.817519Z", "version": "2.0.3"}}]}, "published": "2026-08-06T22:18:28.783", "references": [{"source": "disclosure@vulncheck.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches"}, {"source": "disclosure@vulncheck.com", "tags": ["Patch"], "url": "https://github.com/ggml-org/llama.cpp/commit/5c0d18881e0e9794c96b2602736b758bac9d9388"}, {"source": "disclosure@vulncheck.com", "tags": ["Patch", "Release Notes", "Vendor Advisory"], "url": "https://github.com/ggml-org/llama.cpp/releases/tag/b7446"}, {"source": "disclosure@vulncheck.com", "tags": ["Third Party Advisory"], "url": "https://www.vulncheck.com/advisories/llama-cpp-b1886-b7445-null-pointer-dereference-dos-via-llama-android-cpp"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{"bugzilla": {"description": "llama.cpp: llama.cpp: Denial of Service in Android JNI wrapper via malicious model file", "id": "2512286", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2512286"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["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.", "A flaw was found in llama.cpp. A null pointer dereference vulnerability exists in the LLaMA-Android JNI wrapper. This flaw allows an attacker to provide a malicious or corrupt model file, which causes the `bench_1model()` function to attempt to use an invalid memory address. This leads to a crash of the Android application, resulting in a denial of service (DoS) where the application becomes unavailable."], "mitigation": {"lang": "en:us", "value": "No mitigation is necessary; the Android-specific vulnerable code path is not present in the shipped Linux packages."}, "name": "CVE-2026-70639", "public_date": "2026-08-06T15:37:30Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-70639\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-70639\nhttps://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches\nhttps://github.com/ggml-org/llama.cpp/commit/5c0d18881e0e9794c96b2602736b758bac9d9388\nhttps://github.com/ggml-org/llama.cpp/releases/tag/b7446"], "statement": "llama.cpp is packaged for Fedora (python-llama-cpp-python, ollama, llama-cpp) as Linux command-line/library builds. This flaw is specific to the LLaMA-Android JNI wrapper's bench_1model() function, which is Android-only code that is not compiled or reachable in the standard Linux RPM builds. No Red Hat/community product is affected.", "threat_severity": "Moderate"}

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