CVE-2025-67873 (GCVE-0-2025-67873)

Vulnerability from cvelistv5 – Published: 2025-12-17 21:12 – Updated: 2025-12-18 15:09
VLAI?
Title
Capstone doesn't check Skipdata length, leading to cs_insn.bytes heap buffer overflow
Summary
Capstone is a disassembly framework. In versions 6.0.0-Alpha5 and prior, Skipdata length is not bounds-checked, so a user-provided skipdata callback can make cs_disasm/cs_disasm_iter memcpy more than 24 bytes into cs_insn.bytes, causing a heap buffer overflow in the disassembly path. Commit cbef767ab33b82166d263895f24084b75b316df3 fixes the issue.
Severity ?
4.8 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
References
Impacted products
Vendor Product Version
capstone-engine capstone Affected: <= 6.0.0-Alpha5
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-67873",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-18T14:55:59.806611Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-18T15:09:19.484Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "capstone",
          "vendor": "capstone-engine",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 6.0.0-Alpha5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Capstone is a disassembly framework. In versions 6.0.0-Alpha5 and prior, Skipdata length is not bounds-checked, so a user-provided skipdata callback can make cs_disasm/cs_disasm_iter memcpy more than 24 bytes into cs_insn.bytes, causing a heap buffer overflow in the disassembly path. Commit cbef767ab33b82166d263895f24084b75b316df3 fixes the issue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122: Heap-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-17T21:12:13.739Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg"
        },
        {
          "name": "https://github.com/capstone-engine/capstone/commit/cbef767ab33b82166d263895f24084b75b316df3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/capstone-engine/capstone/commit/cbef767ab33b82166d263895f24084b75b316df3"
        }
      ],
      "source": {
        "advisory": "GHSA-hj6g-v545-v7jg",
        "discovery": "UNKNOWN"
      },
      "title": "Capstone doesn\u0027t check Skipdata length, leading to cs_insn.bytes heap buffer overflow"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-67873",
    "datePublished": "2025-12-17T21:12:13.739Z",
    "dateReserved": "2025-12-12T18:53:03.237Z",
    "dateUpdated": "2025-12-18T15:09:19.484Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-67873\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2025-12-17T22:16:00.147\",\"lastModified\":\"2026-01-02T18:39:54.833\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Capstone is a disassembly framework. In versions 6.0.0-Alpha5 and prior, Skipdata length is not bounds-checked, so a user-provided skipdata callback can make cs_disasm/cs_disasm_iter memcpy more than 24 bytes into cs_insn.bytes, causing a heap buffer overflow in the disassembly path. Commit cbef767ab33b82166d263895f24084b75b316df3 fixes the issue.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L\",\"baseScore\":4.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":1.3,\"impactScore\":3.4},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-122\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:capstone-engine:capstone:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"6.0.0\",\"matchCriteriaId\":\"DD22C7C2-F647-4AB5-BEB4-C70F722C0419\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:capstone-engine:capstone:6.0.0:alpha1:*:*:*:*:*:*\",\"matchCriteriaId\":\"99F76525-F73B-4F66-AE46-A1ECAF0C7A0C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:capstone-engine:capstone:6.0.0:alpha2:*:*:*:*:*:*\",\"matchCriteriaId\":\"442C7F48-5BEE-4702-AC0F-DE5C70FAA93F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:capstone-engine:capstone:6.0.0:alpha3:*:*:*:*:*:*\",\"matchCriteriaId\":\"3C88415A-376C-4F7F-9D7D-3CB5C8FB9346\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:capstone-engine:capstone:6.0.0:alpha4:*:*:*:*:*:*\",\"matchCriteriaId\":\"67358CE5-F734-4E55-B021-D3AC5D937DD4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:capstone-engine:capstone:6.0.0:alpha5:*:*:*:*:*:*\",\"matchCriteriaId\":\"9DED59B8-DC00-4323-89FA-044F7666AF5D\"}]}]}],\"references\":[{\"url\":\"https://github.com/capstone-engine/capstone/commit/cbef767ab33b82166d263895f24084b75b316df3\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]},{\"url\":\"https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"title\": \"Capstone doesn\u0027t check Skipdata length, leading to cs_insn.bytes heap buffer overflow\", \"source\": {\"advisory\": \"GHSA-hj6g-v545-v7jg\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 4.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"LOW\"}}], \"affected\": [{\"vendor\": \"capstone-engine\", \"product\": \"capstone\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c= 6.0.0-Alpha5\"}]}], \"references\": [{\"url\": \"https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg\", \"name\": \"https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/capstone-engine/capstone/commit/cbef767ab33b82166d263895f24084b75b316df3\", \"name\": \"https://github.com/capstone-engine/capstone/commit/cbef767ab33b82166d263895f24084b75b316df3\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Capstone is a disassembly framework. In versions 6.0.0-Alpha5 and prior, Skipdata length is not bounds-checked, so a user-provided skipdata callback can make cs_disasm/cs_disasm_iter memcpy more than 24 bytes into cs_insn.bytes, causing a heap buffer overflow in the disassembly path. Commit cbef767ab33b82166d263895f24084b75b316df3 fixes the issue.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-122\", \"description\": \"CWE-122: Heap-based Buffer Overflow\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2025-12-17T21:12:13.739Z\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-67873\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-12-18T14:55:59.806611Z\"}}}], \"references\": [{\"url\": \"https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"shortName\": \"CISA-ADP\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"dateUpdated\": \"2025-12-18T14:56:03.352Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-67873\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-17T21:12:13.739Z\", \"dateReserved\": \"2025-12-12T18:53:03.237Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2025-12-17T21:12:13.739Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.