CVE-2026-55893

Published: Ago 21, 2026 Last Modified: Ago 21, 2026

ExploitDB:

Other exploit source:

Google Dorks:

HIGH 7,3

Source: [email protected]

Attack Vector: local

Attack Complexity: high

Privileges Required: none

User Interaction: passive

Confidentiality: N/A

Integrity: N/A

Availability: N/A

Description

AI Translation Available

Capstone is a disassembly framework. In 6.0.0-Alpha9 and earlier, Capstone's arch/SH/SHDisassembler.c SH floating-point decoders such as opFADD, opFMUL, and opFSUB call set_reg() and set_reg_n() using sh_info.op.op_count without checking the fixed-size operands[] array. Repeated crafted instructions processed through cs_disasm_iter() or cs_disasm() with CS_ARCH_SH, CS_MODE_SH2A or CS_MODE_SH4A, CS_MODE_SHFPU, and CS_OPT_DETAIL can increment the operand count beyond the 176-byte sh_info allocation and perform a four-byte heap buffer overflow write. The corruption can crash the process and may enable code execution depending on heap layout. This issue is fixed in version 6.0.0-Alpha10.

122

Heap-based Buffer Overflow

Draft

Abstraction: Variant Structure: Simple

Common Consequences

Security Scopes Affected:

Availability Integrity Confidentiality Access Control Other

Potential Impacts:

Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Execute Unauthorized Code Or Commands Bypass Protection Mechanism Modify Memory Other