CVE-2026-15997 (GCVE-0-2026-15997)

Vulnerability from cvelistv5 – Published: 2026-07-16 22:17 – Updated: 2026-07-16 22:17
VLAI
Title
Native ARM SHA3 / SHAKE `restoreFullState` fails to detect size_t underflow in a crafted encoded state
Summary
Out-of-bounds write vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on ARM allows Overflow Buffers. 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. This issue affects BC-LTS: from 2.73.0 before 2.73.12.1. Issue is only applicable if application involved is accepting memoable SHA3 / SHAKE states from potentially untrusted sources.
Severity
1.7 (Low)
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
CWE
Assigner
References
Impacted products
Vendor Product Version
Legion of the Bouncy Castle Inc. BC-LTS Affected: 2.73.0 , < 2.73.12.1 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "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.\u003cp\u003e 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.\u003c/p\u003e\u003cp\u003eThis issue affects BC-LTS: from 2.73.0 before 2.73.12.1.\u003c/p\u003e\u003cp\u003eIssue is only applicable if application involved is accepting memoable SHA3 / SHAKE states from potentially untrusted sources.\u0026nbsp;\u003c/p\u003e"
            }
          ],
          "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."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-100",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-100 Overflow Buffers"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NO",
            "Recovery": "AUTOMATIC",
            "Safety": "PRESENT",
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "LOCAL",
            "baseScore": 1.7,
            "baseSeverity": "LOW",
            "exploitMaturity": "UNREPORTED",
            "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/S:P/AU:N/R:A/V:D/RE:M/U:Amber",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "MODERATE"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787 Out-of-bounds write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-16T22:17:16.525Z",
        "orgId": "91579145-5d7b-4cc5-b925-a0262ff19630",
        "shortName": "bcorg"
      },
      "references": [
        {
          "url": "https://github.com/bcgit/bc-lts-java/wiki/CVE-2026-15997"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Native ARM SHA3 / SHAKE `restoreFullState`  fails to detect size_t underflow in a crafted encoded state",
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "91579145-5d7b-4cc5-b925-a0262ff19630",
    "assignerShortName": "bcorg",
    "cveId": "CVE-2026-15997",
    "datePublished": "2026-07-16T22:17:16.525Z",
    "dateReserved": "2026-07-16T21:47:28.715Z",
    "dateUpdated": "2026-07-16T22:17:16.525Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-15997\",\"sourceIdentifier\":\"91579145-5d7b-4cc5-b925-a0262ff19630\",\"published\":\"2026-07-16T23:16:15.727\",\"lastModified\":\"2026-07-16T23:16:15.727\",\"vulnStatus\":\"Received\",\"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.\"}],\"affected\":[{\"source\":\"91579145-5d7b-4cc5-b925-a0262ff19630\",\"affectedData\":[{\"vendor\":\"Legion of the Bouncy Castle Inc.\",\"product\":\"BC-LTS\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://www.bouncycastle.org/download/bouncy-castle-java-lts/\",\"packageName\":\"bcprov-lts8on\",\"platforms\":[\"ARM\"],\"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\",\"versions\":[{\"version\":\"2.73.0\",\"lessThan\":\"2.73.12.1\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"91579145-5d7b-4cc5-b925-a0262ff19630\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"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\",\"baseScore\":1.7,\"baseSeverity\":\"LOW\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"ACTIVE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"UNREPORTED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"PRESENT\",\"Automatable\":\"NO\",\"Recovery\":\"AUTOMATIC\",\"valueDensity\":\"DIFFUSE\",\"vulnerabilityResponseEffort\":\"MODERATE\",\"providerUrgency\":\"AMBER\"}}]},\"weaknesses\":[{\"source\":\"91579145-5d7b-4cc5-b925-a0262ff19630\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]}],\"references\":[{\"url\":\"https://github.com/bcgit/bc-lts-java/wiki/CVE-2026-15997\",\"source\":\"91579145-5d7b-4cc5-b925-a0262ff19630\"}]}}"
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.