CVE-2026-47143: Capstone has a NULL Pointer Dereference with 3DNow! opcodes

Published Jul 21, 2026
·
Updated

Capstone has a NULL Pointer Dereference with 3DNow! opcodes

Other sources

Capstone is a disassembly framework. Versions prior to 6.0.0-Alpha8 and 5.0.8 have a NULL pointer dereference in modRMRequired() and decode() when disassembling 3DNow! opcodes (0F 0F) in builds compiled with -DCAPSTONEX86REDUCE, allowing a remote attacker to crash any application using the reduced X86 Capstone library by supplying a crafted input containing the 4-byte sequence 0F 0F <modrm> <imm8>. Versions 6.0.0-Alpha8 and 5.0.8 patch the issue.

— MITRE

Affected Software

11 affected componentsFixes available
Capstone Capstone disassembly framework<6.0.0-Alpha8, =5.0.8
Capstone-engine Capstone<5.0.8
Capstone-engine Capstone=6.0.0-alpha1
Capstone-engine Capstone=6.0.0-alpha2
Capstone-engine Capstone=6.0.0-alpha3
Capstone-engine Capstone=6.0.0-alpha4
Capstone-engine Capstone=6.0.0-alpha5
Capstone-engine Capstone=6.0.0-alpha6
Capstone-engine Capstone=6.0.0-alpha7
Microsoft azl3 rust 1.90.0-9<1.90.0-10
1.90.0-10
Microsoft azl3 rust 1.90.0-10<1.90.0-10
1.90.0-10

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 1.90.0-10
  2. Upgrade

    Upgrade Capstone disassembly framework to a version that resolves this vulnerability.

    Fixed in 6.0.0-Alpha8
  3. Upgrade

    Upgrade Capstone disassembly framework to a version that resolves this vulnerability.

    Fixed in 5.0.8

Event History

Jul 21, 2026
CVE Published
via MITRE·08:10 PM
Data Sourced
via MITRE·08:10 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·09:16 PM
RemedyDescriptionSeverityWeaknessAffected Software
Jul 25, 2026
Data Sourced
via Microsoft·08:07 AM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·08:07 AM
Affected Software
Updated
via Microsoft·08:07 AM
DescriptionSeverity
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203
CVE-2026-47143 - Capstone has a NULL Pointer Dereference with 3DNow! opcodes - SecAlerts