{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-120457", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-02T12:42:22.624Z", "datePublished": "2026-11-02T14:29:13.799Z", "dateUpdated": "2026-11-02T15:46:06.742Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-02T14:29:13.799Z"}, "datePublic": "2026-11-01T00:00:00.000Z", "title": "libaec through 1.1.7 Out-of-Bounds Read via m_se_decode() Second Extension Decoder", "descriptions": [{"lang": "en", "value": "libaec through 1.1.7 contains an out-of-bounds read vulnerability in m_se_decode() in src/decode.c that allows attackers to bypass a signed bounds check via an overlong fundamental sequence. Attackers can supply a crafted CCSDS 121.0/SZIP stream with 2^31 or more zero bits to crash the decoder or leak adjacent memory into decoded samples."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Unsigned to Signed Conversion Error", "cweId": "CWE-196", "type": "CWE"}]}], "affected": [{"vendor": "Deutsches Klimarechenzentrum", "product": "libaec", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThanOrEqual": "1.1.7", "status": "affected", "versionType": "semver"}], "repo": "https://github.com/Deutsches-Klimarechenzentrum/libaec"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 5.8, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:H", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 5.3, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/Deutsches-Klimarechenzentrum/libaec/issues/64", "tags": ["issue-tracking"]}, {"url": "https://github.com/Deutsches-Klimarechenzentrum/libaec/pull/66", "tags": ["issue-tracking", "patch"]}, {"url": "https://github.com/Deutsches-Klimarechenzentrum/libaec/blob/v1.1.7/src/decode.c#L556-L586", "tags": ["technical-description"]}, {"url": "https://github.com/Deutsches-Klimarechenzentrum/libaec/releases/tag/v1.1.7", "tags": ["release-notes"], "name": "libaec v1.1.7 Release Notes"}, {"url": "https://hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-read", "tags": ["technical-description"]}, {"name": "VulnCheck Advisory: libaec through 1.1.7 Out-of-Bounds Read via m_se_decode() Second Extension Decoder", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/libaec-through-1.1.7-out-of-bounds-read-via-m-se-decode-second-extension-decoder"}], "credits": [{"lang": "en", "value": "HaiND from the Post and Telecommunication Institute of Technology", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}, "adp": [{"references": [{"url": "https://hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-read", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-02T15:45:31.200283Z", "id": "CVE-2026-120457", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-02T15:46:06.742Z"}}]}}