{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-70640", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-04T20:17:18.298Z", "datePublished": "2026-08-06T15:38:22.994Z", "dateUpdated": "2026-08-06T15:47:17.244Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-06T15:47:17.244Z"}, "title": "llama.cpp b1886\u2013b7445 Race Condition Use-After-Free via llama-android.cpp", "datePublic": "2026-05-06T00:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference", "type": "CWE"}, {"lang": "en", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')", "type": "CWE"}]}], "affected": [{"vendor": "ggml-org", "product": "llama.cpp", "versions": [{"status": "affected", "version": "b1886", "lessThanOrEqual": "b7445", "versionType": "custom"}, {"status": "affected", "version": "0.9.0", "lessThanOrEqual": "0.17.1", "versionType": "semver"}, {"status": "unaffected", "version": "5c0d18881e0e9794c96b2602736b758bac9d9388", "versionType": "git"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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.</p>"}]}], "tags": ["x_open-source"], "references": [{"url": "https://github.com/ggml-org/llama.cpp/releases/tag/b7446", "tags": ["release-notes"]}, {"url": "https://github.com/ggml-org/llama.cpp/commit/5c0d18881e0e9794c96b2602736b758bac9d9388", "tags": ["patch"]}, {"url": "https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches", "tags": ["related"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.3, "vectorString": "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"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}}], "credits": [{"lang": "en", "value": "Vladimir Tokarev (@G1ND1L4) - Vulnerability Research Tech Lead, Cyera", "type": "finder"}, {"lang": "en", "value": "Ofek Itach (@ofekitach) - Security Research Team Lead, Cyera", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "vulncheck"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[b1886,b7445]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.9.0,0.17.1]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "code_commit", "value": "5c0d18881e0e9794c96b2602736b758bac9d9388"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "llama.cpp", "source": "cna", "vendor": "ggml-org"}, "product": "llama.cpp", "vendor": "ggml-org"}], "created": "2026-08-07T01:15:05.059635+00:00", "updated": "2026-08-07T02:00:06.386172+00:00", "vendors": ["ggml-org", "ggml-org$PRODUCT$llama.cpp"]}