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CVE details

CVE-2026-47143

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 `-DCAPSTONE_X86_REDUCE`, 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.

Score
5.1 medium
Published
2026-07-21
Links
NVD · cve.org

Matched ports (1)

PortPackageVersionStatusMaintainer
devel/capstone4capstone44.0.2_1unaddressedoleksii.tsai@gmail.com

Template for a VuXML entry

Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.

  <vuln vid="FIXME (make newentry)">
    <topic>FIXME -- FIXME</topic>
    <affects>
      <package>
	<name>capstone4</name>
	<range><lt>5.0.8</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>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 `-DCAPSTONE_X86_REDUCE`, 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.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-47143</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-47143</url>
    </references>
    <dates>
      <discovery>2026-07-21</discovery>
      <entry>2026-10-26</entry>
    </dates>
  </vuln>