{"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":"2026-08-14T16:51:39.415Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-08-14T16:51:39.415Z"},"title":"llama.cpp b1886–b7445 Race Condition Use-After-Free via llama-android.cpp","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."}],"tags":["x_open-source"],"datePublic":"2026-05-06T00:00:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-476","description":"NULL Pointer Dereference","type":"CWE"},{"lang":"en","cweId":"CWE-362","description":"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"}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:ggml:llama.cpp:*:*:*:*:*:*:*:*","versionStartIncluding":"b1886","versionEndIncluding":"b7445"},{"vulnerable":true,"criteria":"cpe:2.3:a:ggml:llama.cpp:*:*:*:*:*:*:*:*","versionStartIncluding":"0.9.0","versionEndIncluding":"0.17.1"}]}]}],"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":{"attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","version":"3.1","baseSeverity":"HIGH","baseScore":7,"vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}}],"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"]},{"url":"https://www.vulncheck.com/advisories/llama-cpp-b1886-b7445-race-condition-use-after-free-via-llama-android-cpp","tags":["third-party-advisory"]}],"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"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-07T16:18:29.875187Z","id":"CVE-2026-70640","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-07T16:18:40.029Z"}}]}}