{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-71470", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-15T15:42:34.826Z", "datePublished": "2026-11-15T15:51:19.706Z", "dateUpdated": "2026-11-15T15:51:19.706Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-15T15:51:19.706Z"}, "datePublic": "2025-12-25T00:00:00.000Z", "title": "MicroQuickJS before commit 99eed3f Out-of-Bounds Read in build_backtrace", "descriptions": [{"lang": "en", "value": "MicroQuickJS (mquickjs) before commit 99eed3f contains an out-of-bounds read vulnerability because JS_Call() raises exceptions during frame setup without updating ctx->sp and ctx->fp. Attackers can supply JavaScript that calls a non-function value, causing build_backtrace() to walk stale frame pointers and crash the engine for denial of service."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Out-of-bounds Read", "cweId": "CWE-125", "type": "CWE"}]}], "affected": [{"vendor": "bellard", "product": "mquickjs", "defaultStatus": "unaffected", "versions": [{"version": "0", "status": "affected", "versionType": "git", "lessThan": "99eed3f94cb66ea7e02fd3472ca7374dee31bb89"}], "packageURL": "pkg:github/bellard/mquickjs", "repo": "https://github.com/bellard/mquickjs"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "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", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/bellard/mquickjs/issues/24", "tags": ["issue-tracking"]}, {"url": "https://github.com/bellard/mquickjs/commit/99eed3f94cb66ea7e02fd3472ca7374dee31bb89", "tags": ["patch"]}, {"url": "https://github.com/sigdevel/pocs/blob/main/res/mquickjs/1/mquickjs_c_3981", "tags": ["exploit"]}, {"name": "VulnCheck Advisory: MicroQuickJS before commit 99eed3f Out-of-Bounds Read in build_backtrace", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/microquickjs-before-commit-99eed3f-out-of-bounds-read-in-build-backtrace"}], "credits": [{"lang": "en", "value": "Alexander A. Shvedov (sigdevel)", "type": "finder"}, {"lang": "en", "value": "Fabrice Bellard", "type": "remediation developer"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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