{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-43629", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-05-01T18:22:45.641Z", "datePublished": "2026-08-06T15:48:41.246Z", "dateUpdated": "2026-08-14T16:49:54.546Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-14T16:49:54.546Z" }, "title": "llama.cpp b4882–b9058 Buffer Overflow in KV Cache State Restore", "descriptions": [ { "lang": "en", "value": "llama.cpp builds b4882 through b9058 contain a heap buffer overflow vulnerability in the KV cache state restore path where the state_read_data() function computes write size without overflow checking, allowing attackers with write access to the slot_save_path directory to corrupt heap memory. Attackers can craft malicious state files where cell_count multiplication overflows or exceeds tensor buffer allocation to write attacker-controlled bytes past buffer boundaries, potentially resulting in heap metadata corruption, model weight corruption, or arbitrary code execution via function pointer overwrite." } ], "tags": [ "x_open-source" ], "datePublic": "2026-05-06T00:00:00.000Z", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-787", "description": "Out-of-bounds Write", "type": "CWE" }, { "lang": "en", "cweId": "CWE-190", "description": "Integer Overflow or Wraparound", "type": "CWE" } ] } ], "affected": [ { "vendor": "ggml-org", "product": "llama.cpp", "versions": [ { "status": "affected", "version": "b4882", "lessThanOrEqual": "b9058", "versionType": "custom" }, { "status": "affected", "version": "0.16.1", "lessThanOrEqual": "0.17.1", "versionType": "semver" } ], "defaultStatus": "affected" } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:ggml:llama.cpp:*:*:*:*:*:*:*:*", "versionStartIncluding": "b4882", "versionEndIncluding": "b9058" }, { "vulnerable": true, "criteria": "cpe:2.3:a:ggml:llama.cpp:*:*:*:*:*:*:*:*", "versionStartIncluding": "0.16.1", "versionEndIncluding": "0.17.1" } ] } ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "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": "CRITICAL", "baseScore": 9.2, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV3_1": { "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "version": "3.1", "baseSeverity": "HIGH", "baseScore": 8.1, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H" } } ], "references": [ { "url": "https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches", "tags": [ "mitigation" ] }, { "url": "https://www.vulncheck.com/advisories/llama-cpp-b4882-b9058-buffer-overflow-in-kv-cache-state-restore", "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": "2026-08-07T15:39:29.511247Z", "id": "CVE-2026-43629", "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": "2026-08-07T17:09:56.359Z" } } ] } }