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CVE-2026-55894

Published Aug 20, 2026 CWE-125 EPSS 0.13% (3th pctl)

Overview

CVE-2026-55894 is a known-severity vulnerability. It was published on August 20, 2026.

Technical Description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHub github.com/capstone-engine/capstone/commit/09e76802380b9e94d9720c44458d9d5282219e7e GitHub github.com/capstone-engine/capstone/commit/e17ee44a8307ea33375b4727ac4f987650bf7bed GitHub github.com/capstone-engine/capstone/pull/2968 GitHub github.com/capstone-engine/capstone/pull/2969 GitHub github.com/capstone-engine/capstone/releases/tag/6.0.0-Alpha10 GitHub github.com/capstone-engine/capstone/security/advisories/GHSA-gf2c-xwcp-hvf4 GitHub github.com/capstone-engine/capstone/security/advisories/GHSA-gf2c-xwcp-hvf4

Frequently Asked Questions

What is CVE-2026-55894?

CVE-2026-55894 is a known-severity vulnerability. It was published on August 20, 2026.

How severe is CVE-2026-55894?

CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.

How do I fix or remediate CVE-2026-55894?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-55894?

CyberStrike's AI-powered security agents can automatically detect CVE-2026-55894 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

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