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CVE details

CVE-2026-121964

FreeRDP before 3.32.2 contains a heap-based buffer overflow in the RD Gateway RPC client, where rpc_client_recv_fragment writes BIND_ACK and ALTER_CONTEXT_RESP fragments into a persistent PDU stream after checking only total capacity rather than remaining capacity from the current stream position. A malicious or compromised RD Gateway can send crafted RPC fragments with manipulated alloc_hint and frag_length values to overwrite client heap memory with attacker-controlled data, causing a crash or potentially arbitrary code execution.

Score
8.7 high
Published
2026-11-04
Links
NVD · cve.org · Report wrong data

Matched ports (1)

PortPackageVersionStatusMaintainer
net/freerdpfreerdp2.11.8_1unaddressedvvd@FreeBSD.org

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Check the version numbers before you commit this entry. Some ports share an entry in the CVE database with another port, such as sqlite2 and sqlite3. The version shown here may then be one that never existed for this port.

Ranges per package from the CVE rows that match this port, in pkg notation with the port's epoch and revision, every bound checked with pkg; one range per epoch the port actually had. make newentry in security/vuxml creates the vid.

  <vuln vid="FIXME (make newentry)">
    <topic>freerdp -- FIXME</topic>
    <affects>
      <package>
	<name>freerdp</name>
	<range><lt>3.32.2</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>CVE-2026-121964: FreeRDP before 3.32.2 contains a heap-based buffer
	  overflow in the RD Gateway RPC client, where
	  rpc_client_recv_fragment writes BIND_ACK and ALTER_CONTEXT_RESP
	  fragments into a persistent PDU stream after checking only total
	  capacity rather than remaining capacity from the current stream
	  position. A malicious or compromised RD Gateway can send crafted
	  RPC fragments with manipulated alloc_hint and frag_length values to
	  overwrite client heap memory with attacker-controlled data, causing
	  a crash or potentially arbitrary code execution.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-121964</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-121964</url>
    </references>
    <dates>
      <discovery>2026-11-04</discovery>
      <entry>2026-11-04</entry>
    </dates>
  </vuln>