{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55894","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-17T16:59:42.760Z","datePublished":"2026-08-20T21:31:37.680Z","dateUpdated":"2026-08-21T15:00:05.011Z"},"containers":{"cna":{"title":"Capstone SH disassembler `sh_disassemble` out-of-bounds read via crafted SH2A bytecode","problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125: Out-of-bounds Read","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/capstone-engine/capstone/security/advisories/GHSA-gf2c-xwcp-hvf4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/capstone-engine/capstone/security/advisories/GHSA-gf2c-xwcp-hvf4"},{"name":"https://github.com/capstone-engine/capstone/pull/2968","tags":["x_refsource_MISC"],"url":"https://github.com/capstone-engine/capstone/pull/2968"},{"name":"https://github.com/capstone-engine/capstone/pull/2969","tags":["x_refsource_MISC"],"url":"https://github.com/capstone-engine/capstone/pull/2969"},{"name":"https://github.com/capstone-engine/capstone/commit/09e76802380b9e94d9720c44458d9d5282219e7e","tags":["x_refsource_MISC"],"url":"https://github.com/capstone-engine/capstone/commit/09e76802380b9e94d9720c44458d9d5282219e7e"},{"name":"https://github.com/capstone-engine/capstone/commit/e17ee44a8307ea33375b4727ac4f987650bf7bed","tags":["x_refsource_MISC"],"url":"https://github.com/capstone-engine/capstone/commit/e17ee44a8307ea33375b4727ac4f987650bf7bed"},{"name":"https://github.com/capstone-engine/capstone/releases/tag/6.0.0-Alpha10","tags":["x_refsource_MISC"],"url":"https://github.com/capstone-engine/capstone/releases/tag/6.0.0-Alpha10"}],"affected":[{"vendor":"capstone-engine","product":"capstone","versions":[{"version":"< 6.0.0-Alpha10","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-20T21:31:37.680Z"},"descriptions":[{"lang":"en","value":"Capstone is a disassembly framework. In 6.0.0-Alpha9 and earlier, Capstone's arch/SH/SHDisassembler.c sh_disassemble() function computes an idx value from a raw 16-bit instruction without ensuring it is within the active mode-specific decode[] function-pointer table. An application using CS_ARCH_SH with CS_MODE_SH2A or CS_MODE_SH4A and CS_MODE_SHFPU can pass crafted bytecode through cs_disasm_iter() or cs_disasm(), causing the decode[idx] test to read outside the table and terminate the process with a segmentation fault. No code execution or information disclosure was demonstrated. This issue is fixed in version 6.0.0-Alpha10."}],"source":{"advisory":"GHSA-gf2c-xwcp-hvf4","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/capstone-engine/capstone/security/advisories/GHSA-gf2c-xwcp-hvf4","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-21T14:59:57.566989Z","id":"CVE-2026-55894","options":[{"Exploitation":"poc"},{"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":"2026-08-21T15:00:05.011Z"}}]}}