{"id":"CVE-2026-55894","title":"Capstone is a disassembly framework","summary":"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 de…","severity":"none","cwe":["CWE-125"],"published":"2026-08-20","updated":"2026-09-18","sourceUpdated":"2026-09-18T20:09:01.757","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55894","references":[{"url":"https://github.com/capstone-engine/capstone/commit/09e76802380b9e94d9720c44458d9d5282219e7e","label":"security-advisories@github.com"},{"url":"https://github.com/capstone-engine/capstone/commit/e17ee44a8307ea33375b4727ac4f987650bf7bed","label":"security-advisories@github.com"},{"url":"https://github.com/capstone-engine/capstone/pull/2968","label":"security-advisories@github.com"},{"url":"https://github.com/capstone-engine/capstone/pull/2969","label":"security-advisories@github.com"},{"url":"https://github.com/capstone-engine/capstone/releases/tag/6.0.0-Alpha10","label":"security-advisories@github.com"},{"url":"https://github.com/capstone-engine/capstone/security/advisories/GHSA-gf2c-xwcp-hvf4","label":"security-advisories@github.com"},{"url":"https://github.com/capstone-engine/capstone/security/advisories/GHSA-gf2c-xwcp-hvf4","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00209,"epssPercentile":0.11332,"ingestedAt":"2026-09-18T20:51:25.650Z","slug":"CVE-2026-55894","body":"## Overview\n\nCapstone 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}