CVE-2026-49282: CWE-125: Out-of-bounds Read in capstone-engine capstone
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.
AI Analysis
Technical Summary
Capstone's cs_insn_name() API forwards caller-supplied instruction IDs to architecture backends. While most backends validate these IDs before indexing instruction-name tables, the M68K and RISCV backends lack complete bounds checking. This allows an attacker controlling the instruction ID on a Capstone handle opened for M68K or RISCV to trigger an out-of-bounds read, causing a process crash. The vulnerability impacts availability but does not demonstrate code execution or data leakage. The issue is fixed in version 6.0.0-Alpha9.
Potential Impact
The vulnerability can cause a denial of service by crashing processes that use the vulnerable Capstone API with untrusted instruction IDs on M68K or RISCV architectures. There is no evidence of code execution or data disclosure from this flaw.
Mitigation Recommendations
Upgrade to Capstone version 6.0.0-Alpha9 or later, which contains the fix for this vulnerability. Patch status is not explicitly confirmed beyond the version containing the fix; verify with the vendor advisory for the latest remediation guidance.
CVE-2026-49282: CWE-125: Out-of-bounds Read in capstone-engine capstone
Description
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 v3.1
Score 5.1medium
Affected software
capstone-engine
capstone
pkg:github/capstone-engine/capstoneRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Capstone's cs_insn_name() API forwards caller-supplied instruction IDs to architecture backends. While most backends validate these IDs before indexing instruction-name tables, the M68K and RISCV backends lack complete bounds checking. This allows an attacker controlling the instruction ID on a Capstone handle opened for M68K or RISCV to trigger an out-of-bounds read, causing a process crash. The vulnerability impacts availability but does not demonstrate code execution or data leakage. The issue is fixed in version 6.0.0-Alpha9.
Potential Impact
The vulnerability can cause a denial of service by crashing processes that use the vulnerable Capstone API with untrusted instruction IDs on M68K or RISCV architectures. There is no evidence of code execution or data disclosure from this flaw.
Mitigation Recommendations
Upgrade to Capstone version 6.0.0-Alpha9 or later, which contains the fix for this vulnerability. Patch status is not explicitly confirmed beyond the version containing the fix; verify with the vendor advisory for the latest remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-28T20:07:58.861Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a7f56e0bf8831d5397df77f
Added to database: 08/14/2026, 17:56:48 UTC
Last enriched: 08/22/2026, 13:17:17 UTC
Last updated: 09/28/2026, 16:22:10 UTC
Views: 75
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