{"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"}}]}}