TI-2026-36469 Aliases CVE-2026-49282

Capstone M68K and RISCV `cs_insn_name()` invalid IDs can trigger out-of-bounds reads and process crashes

MEDIUM 56CWE-125Published 2026-08-14 · Updated 2026-08-17

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · None · Low
Fix status: Partial Red Hat: 1 fixed, 4 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00176 7th percentileScored 2026-11-07

Fix Partial capstone (capstone-engine): 6.0.0-Alpha9Red Hat: 1 advisoryRed Hat: 1 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
capstone-engine	capstone	before 6.0.0-Alpha9	6.0.0-Alpha9	Patch available	CNA

capstone Vendorcapstone-engine Affected before 6.0.0-Alpha9 Fixed in 6.0.0-Alpha9 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:capstone-engine:capstone::::::::	—	—	capstone-engine

cpe:2.3:a:capstone-engine:capstone:*:*:*:*:*:*:*:* Versions — — ·capstone-engine

Remediation

Fix · CNA capstone (capstone-engine) Fixed in 6.0.0-Alpha9

Red Hat 1 advisory

RHSA-2026:81540 Released 2026-10-12 · Red Hat rating Moderate
Red Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images capstone-5.0.8-0.5.hum1@aarch64, capstone-5.0.8-0.5.hum1@s390x, capstone-5.0.8-0.5.hum1@src +13

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix planned: Will not fix
Red Hat Enterprise Linux 9	Affected	No fix planned: Will not fix
Red Hat OpenShift Container Platform 4	Affected	No fix yet: Fix deferred
Red Hat OpenShift Container Platform 5	Affected	No fix yet: Fix deferred
Red Hat Hardened Images	Fixed	RHSA-2026:81540

Timeline

2026-10-02 Threatist record created from CVE-2026-49282
2026-10-13 Fix available: RHSA-2026:81540 · Red Hat
2026-10-13 Fix available: Red Hat Hardened Images · Red Hat
2026-11-03 Affected versions changed · Red Hat

References

Other 2

TI-2025-41703 Capstone doesn't check vsnprintf return in SStream_concat, allows stack buffer underflow and overflow CVSS 3.1CRITICAL 9.8
TI-2025-41500 Capstone doesn't check Skipdata length, leading to cs_insn.bytes heap buffer overflow CVSS 3.1HIGH 7.8
TI-2026-40345 Capstone SH disassembler `sh_disassemble` out-of-bounds read via crafted SH2A bytecode CVSS 4.0MEDIUM 6.8
TI-2026-34733 Capstone has a NULL Pointer Dereference with 3DNow! opcodes CVSS 3.1MEDIUM 5.9
TI-2026-36458 Capstone WASM `br_table` instruction-size truncation can cause no-progress disassembly and parser desynchronization CVSS 4.0LOW 2.0
TI-2017-04662 Integer overflow in the cs_winkernel_malloc function in winkernel_mm.c in Capstone 3.0.4… CVSS 3.0HIGH 8.8

See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences