NASM’s disasm() function contains a stack based buffer overflow when formatting disassembly output, allowing an attacker triggered out-of-bounds write when `slen` exceeds the buffer capacity.

NASM’s disasm() function contains a stack based buffer overflow when formatting disassembly output, allowing an attacker triggered out-of-bounds write when `slen` exceeds the buffer capacity.

Affected: Ubuntu:16.04:LTS: nasm, Ubuntu:18.04:LTS: nasm, Ubuntu:20.04:LTS: nasm, Ubuntu:Pro:22.04:LTS: nasm, Ubuntu:Pro:24.04:LTS: nasm, Ubuntu:25.10: nasm, Ubuntu:26.04:LTS: nasm

NASM’s disasm() function contains a stack based buffer overflow when formatting disassembly output, allowing an attacker triggered out-of-bounds write when `slen` exceeds the buffer capacity.