CVE-2026-15997

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-15997", "assignerOrgId": "91579145-5d7b-4cc5-b925-a0262ff19630", "state": "PUBLISHED", "assignerShortName": "bcorg", "dateReserved": "2026-07-16T21:47:28.715Z", "datePublished": "2026-07-16T22:17:16.525Z", "dateUpdated": "2026-07-17T13:12:39.282Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "91579145-5d7b-4cc5-b925-a0262ff19630", "shortName": "bcorg", "dateUpdated": "2026-07-16T22:17:16.525Z"}, "title": "Native ARM SHA3 / SHAKE `restoreFullState` fails to detect size_t underflow in a crafted encoded state", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds write", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-100", "descriptions": [{"lang": "en", "value": "CAPEC-100 Overflow Buffers"}]}], "affected": [{"vendor": "Legion of the Bouncy Castle Inc.", "product": "BC-LTS", "platforms": ["ARM"], "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java-lts/", "packageName": "bcprov-lts8on", "repo": "https://github.com/bcgit/bc-lts-java", "programFiles": ["https://github.com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/shake.c", "https://github.com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/sha3.c"], "versions": [{"status": "affected", "version": "2.73.0", "lessThan": "2.73.12.1", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Out-of-bounds write vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on ARM allows Overflow Buffers.\n\n This vulnerability is associated with program files https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/shake.C, https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/sha3.C.\n\n\n\nThis issue affects BC-LTS: from 2.73.0 before 2.73.12.1.\n\n\n\nIssue is only applicable if application involved is accepting memoable SHA3 / SHAKE states from potentially untrusted sources.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Out-of-bounds write vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on ARM allows Overflow Buffers.<p> This vulnerability is associated with program files https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/shake.C, https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/sha3.C.</p><p>This issue affects BC-LTS: from 2.73.0 before 2.73.12.1.</p><p>Issue is only applicable if application involved is accepting memoable SHA3 / SHAKE states from potentially untrusted sources.&nbsp;</p>"}]}], "references": [{"url": "https://github.com/bcgit/bc-lts-java/wiki/CVE-2026-15997"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "UNREPORTED", "Safety": "PRESENT", "Automatable": "NO", "Recovery": "AUTOMATIC", "valueDensity": "DIFFUSE", "vulnerabilityResponseEffort": "MODERATE", "providerUrgency": "AMBER", "version": "4.0", "baseSeverity": "LOW", "baseScore": 1.7, "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/S:P/AU:N/R:A/V:D/RE:M/U:Amber"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-17T13:12:14.471058Z", "id": "CVE-2026-15997", "options": [{"Exploitation": "none"}, {"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": "2026-07-17T13:12:39.282Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-15997", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-17T13:12:14.471058Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-17T13:12:26.431Z"}}], "cna": {"title": "Native ARM SHA3 / SHAKE `restoreFullState` fails to detect size_t underflow in a crafted encoded state", "source": {"discovery": "UNKNOWN"}, "impacts": [{"capecId": "CAPEC-100", "descriptions": [{"lang": "en", "value": "CAPEC-100 Overflow Buffers"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "PRESENT", "version": "4.0", "Recovery": "AUTOMATIC", "baseScore": 1.7, "Automatable": "NO", "attackVector": "LOCAL", "baseSeverity": "LOW", "valueDensity": "DIFFUSE", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/S:P/AU:N/R:A/V:D/RE:M/U:Amber", "exploitMaturity": "UNREPORTED", "providerUrgency": "AMBER", "userInteraction": "ACTIVE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnerabilityResponseEffort": "MODERATE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://github.com/bcgit/bc-lts-java", "vendor": "Legion of the Bouncy Castle Inc.", "product": "BC-LTS", "versions": [{"status": "affected", "version": "2.73.0", "lessThan": "2.73.12.1", "versionType": "semver"}], "platforms": ["ARM"], "packageName": "bcprov-lts8on", "programFiles": ["https://github.com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/shake.c", "https://github.com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/sha3.c"], "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java-lts/", "defaultStatus": "unaffected"}], "references": [{"url": "https://github.com/bcgit/bc-lts-java/wiki/CVE-2026-15997"}], "x_generator": {"engine": "Vulnogram 1.0.2"}, "descriptions": [{"lang": "en", "value": "Out-of-bounds write vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on ARM allows Overflow Buffers.\n\n This vulnerability is associated with program files https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/shake.C, https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/sha3.C.\n\n\n\nThis issue affects BC-LTS: from 2.73.0 before 2.73.12.1.\n\n\n\nIssue is only applicable if application involved is accepting memoable SHA3 / SHAKE states from potentially untrusted sources.", "supportingMedia": [{"type": "text/html", "value": "Out-of-bounds write vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on ARM allows Overflow Buffers.<p> This vulnerability is associated with program files https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/shake.C, https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/sha3.C.</p><p>This issue affects BC-LTS: from 2.73.0 before 2.73.12.1.</p><p>Issue is only applicable if application involved is accepting memoable SHA3 / SHAKE states from potentially untrusted sources.&nbsp;</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds write"}]}], "providerMetadata": {"orgId": "91579145-5d7b-4cc5-b925-a0262ff19630", "shortName": "bcorg", "dateUpdated": "2026-07-16T22:17:16.525Z"}}}, "cveMetadata": {"cveId": "CVE-2026-15997", "state": "PUBLISHED", "dateUpdated": "2026-07-17T13:12:39.282Z", "dateReserved": "2026-07-16T21:47:28.715Z", "assignerOrgId": "91579145-5d7b-4cc5-b925-a0262ff19630", "datePublished": "2026-07-16T22:17:16.525Z", "assignerShortName": "bcorg"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java-lts/", "defaultStatus": "unaffected", "packageName": "bcprov-lts8on", "platforms": ["ARM"], "product": "BC-LTS", "programFiles": ["https://github.com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/shake.c", "https://github.com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/sha3.c"], "repo": "https://github.com/bcgit/bc-lts-java", "vendor": "Legion of the Bouncy Castle Inc.", "versions": [{"lessThan": "2.73.12.1", "status": "affected", "version": "2.73.0", "versionType": "semver"}]}], "source": "91579145-5d7b-4cc5-b925-a0262ff19630"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Out-of-bounds write vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on ARM allows Overflow Buffers.\n\n This vulnerability is associated with program files https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/shake.C, https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/sha3.C.\n\n\n\nThis issue affects BC-LTS: from 2.73.0 before 2.73.12.1.\n\n\n\nIssue is only applicable if application involved is accepting memoable SHA3 / SHAKE states from potentially untrusted sources."}, {"lang": "es", "value": "Vulnerabilidad de escritura fuera de l\u00edmites en Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on en ARM permite desbordamientos de b\u00fafer.\n\nEsta vulnerabilidad est\u00e1 asociada con los archivos de programa https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/shake.C, https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/sha3.C.\n\nEste problema afecta a BC-LTS: desde la versi\u00f3n 2.73.0 hasta antes de la 2.73.12.1.\n\nEl problema solo es aplicable si la aplicaci\u00f3n involucrada est\u00e1 aceptando estados SHA3 / SHAKE memorizables de fuentes potencialmente no confiables."}], "id": "CVE-2026-15997", "lastModified": "2026-10-24T20:10:00.137", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NO", "Recovery": "AUTOMATIC", "Safety": "PRESENT", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 1.7, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "UNREPORTED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "AMBER", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "DIFFUSE", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:N/R:A/V:D/RE:M/U:Amber", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "MODERATE"}, "source": "91579145-5d7b-4cc5-b925-a0262ff19630", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-15997", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-17T13:12:14.471058Z", "version": "2.0.3"}}]}, "published": "2026-07-16T23:16:15.727", "references": [{"source": "91579145-5d7b-4cc5-b925-a0262ff19630", "url": "https://github.com/bcgit/bc-lts-java/wiki/CVE-2026-15997"}], "sourceIdentifier": "91579145-5d7b-4cc5-b925-a0262ff19630", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "91579145-5d7b-4cc5-b925-a0262ff19630", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": ["arm"], "status": "affected", "versions": {"scheme": "semver", "value": "[2.73.0,2.73.12.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "BC-LTS", "source": "cna", "vendor": "Legion of the Bouncy Castle Inc."}, "product": "bc-lts", "vendor": "legion_of_the_bouncy_castle_inc."}], "created": "2026-07-22T04:15:12.326779+00:00", "updated": "2026-07-31T01:15:18.435582+00:00", "vendors": ["legion_of_the_bouncy_castle_inc.", "legion_of_the_bouncy_castle_inc.$PRODUCT$bc-lts"]}