CVE-2026-49282: medium-severity vulnerability in capstone-engine capstone
Capstone M68K and RISCV `cs_insn_name()` invalid IDs can trigger out-of-bounds reads and process crashes
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.1epss 0.2%
Capstone is a disassembly framework. Prior to version 6.0.0-Alpha9, Capstone's public `cs_insn_name()` API forwards caller-supplied instruction IDs directly to the selected architecture backend. Most backends validate the ID before indexing instruction-name tables, but the M68K and RISCV backends have missing or incomplete bounds checks. On a Capstone handle opened for M68K or RISCV, a caller-controlled invalid instruction ID can trigger an out-of-bounds read and crash the process. The demonstrated impact is availability loss in applications or bindings that expose instruction-name lookup to untrusted IDs. No code execution or data disclosure was demonstrated. Version 6.0.0-Alpha9 patches the issue.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Affected products
capstone-engine · capstoneRelated CVEs — capstone-engine capstone
In the same product, most dangerous first.
CVE-2026-47143MEDIUMCapstone has a NULL Pointer Dereference with 3DNow! opcodesEPSS 0.5%CVE-2025-67873MEDIUMCapstone doesn't check Skipdata length, leading to cs_insn.bytes heap buffer overflowEPSS 0.2%CVE-2025-68114MEDIUMCapstone doesn't check vsnprintf return in SStream_concat, allows stack buffer underflow and overflowEPSS 0.2%CVE-2026-55894MEDIUMCapstone SH disassembler `sh_disassemble` out-of-bounds read via crafted SH2A bytecodeEPSS 0.2%CVE-2026-55893HIGHCapstone SH disassembler `set_reg_n` heap buffer overflow via crafted SH2A FPU bytecodeEPSS 0.2%CVE-2026-49263LOWCapstone WASM `br_table` instruction-size truncation can cause no-progress disassembly and parser desynchronizationEPSS 0.2%