{"id":"CVE-2025-67873","state":"PUBLISHED","title":"Capstone doesn't check Skipdata length, leading to cs_insn.bytes heap buffer overflow","description":"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.","publishedAt":"2025-12-17T21:12:13.739Z","updatedAt":"2025-12-18T15:09:19.484Z","severity":{"score":4.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["capstone-engine capstone"],"affected":[{"vendor":"capstone-engine","product":"capstone","versions":[{"version":"<= 6.0.0-Alpha5","status":"affected"}]}],"references":["https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg","https://github.com/capstone-engine/capstone/commit/cbef767ab33b82166d263895f24084b75b316df3"],"weaknesses":["CWE-122"],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/67xxx/CVE-2025-67873.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-67873","state":"PUBLISHED","datePublished":"2025-12-17T21:12:13.739Z","dateUpdated":"2025-12-18T15:09:19.484Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-12-12T18:53:03.237Z"},"containers":{"cna":{"title":"Capstone doesn't check Skipdata length, leading to cs_insn.bytes heap buffer overflow","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."}],"affected":[{"vendor":"capstone-engine","product":"capstone","versions":[{"version":"<= 6.0.0-Alpha5","status":"affected"}]}],"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"]}],"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","lang":"en","description":"CWE-122: Heap-based Buffer Overflow","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-12-17T21:12:13.739Z"},"source":{"advisory":"GHSA-hj6g-v545-v7jg","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-12-18T14:55:59.806611Z","id":"CVE-2025-67873","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-12-18T15:09:19.484Z"}}]}}}