CVE-2026-55893

A flaw was found in Capstone, a disassembly framework. The SH floating-point decoders in arch/SH/SHDisassembler.c do not correctly validate the size of the operands array when processing certain instructions. This vulnerability allows a local attacker to provide specially crafted SH2A FPU bytecod...

Heap-based Buffer Overflow

Overview Affected versions of this package are vulnerable to Heap-based Buffer Overflow via the setregn function. An attacker can cause a four-byte heap buffer overflow by supplying crafted SH2A FPU bytecode processed through csdisasmiter or csdisasm with specific architecture and mode options,...

CVE-2026-55893 Capstone SH disassembler `set_reg_n` heap buffer overflow via crafted SH2A FPU bytecode

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 setreg and setregn using shinfo.op.opcount without checking the fixed-size operands array. Repeated crafted instructions process...