Affected: AlmaLinux:10: freerdp, AlmaLinux:10: freerdp-devel, AlmaLinux:10: freerdp-libs, AlmaLinux:10: freerdp-server, AlmaLinux:10: libwinpr, AlmaLinux:10: libwinpr-devel

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

Security Fix(es):

* FreeRDP: FreeRDP: Remote code execution or denial of service via heap-based buffer overflow (CVE-2026-64620) * FreeRDP: FreeRDP: Double-free vulnerability via crafted .rdp file leading to potential remote code execution (CVE-2026-64621) * FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files (CVE-2026-64624) * FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message (CVE-2026-67299) * FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection (CVE-2026-67289) * FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow (CVE-2026-68580)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

FreeRDP before 3.28.0 (affected <=3.27.1) contains a heap-based buffer overflow in crypto_rsa_common() (libfreerdp/crypto/crypto.c). The function writes the modular-exponentiation result into the caller's output buffer via BN_bn2bin() and only afterward checks output_length > out_length, so out-of-bounds bytes are written before the bounds check. On the server side, when a client selects RDP Standard Security, the encrypted client random is decrypted into a fixed 32-byte buffer. Because the server publishes its RSA public key, an unauthenticated attacker can forge a ciphertext whose decrypted value is up to the full modulus length (e.g. 256 bytes for RSA-2048), overflowing the 32-byte heap buffer by up to ~224 attacker-controlled bytes pre-authentication, resulting in denial of service.

FreeRDP before 3.28.0 (affected <=3.27.1) contains a heap-based buffer overflow in crypto_rsa_common() (libfreerdp/crypto/crypto.c). The function writes the modular-exponentiation result into the caller's output buffer via BN_bn2bin() and only afterward checks output_length > out_length, so out-of-bounds bytes are written before the bounds check. On the server side, when a client selects RDP Standard Security, the encrypted client random is decrypted into a fixed 32-byte buffer. Because the server publishes its RSA public key, an unauthenticated attacker can forge a ciphertext whose decrypted value is up to the full modulus length (e.g. 256 bytes for RSA-2048), overflowing the 32-byte heap buffer by up to ~224 attacker-controlled bytes pre-authentication, resulting in denial of service.

FreeRDP: FreeRDP: Remote code execution or denial of service via heap-based buffer overflow FreeRDP: FreeRDP: Double-free vulnerability via crafted .rdp file leading to potential remote code execution FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow

FreeRDP: FreeRDP: Remote code execution or denial of service via heap-based buffer overflow FreeRDP: FreeRDP: Double-free vulnerability via crafted .rdp file leading to potential remote code execution FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow

Affected: Rocky Linux:10: freerdp

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

Security Fix(es):

* FreeRDP: FreeRDP: Remote code execution or denial of service via heap-based buffer overflow (CVE-2026-64620)

* FreeRDP: FreeRDP: Double-free vulnerability via crafted .rdp file leading to potential remote code execution (CVE-2026-64621)

* FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files (CVE-2026-64624)

* FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message (CVE-2026-67299)

* FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection (CVE-2026-67289)

* FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow (CVE-2026-68580)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected: Ubuntu:16.04:LTS: freerdp, Ubuntu:Pro:18.04:LTS: freerdp2, Ubuntu:18.04:LTS: freerdp, Ubuntu:Pro:20.04:LTS: freerdp2, Ubuntu:22.04:LTS: freerdp2, Ubuntu:24.04:LTS: freerdp3, Ubuntu:Pro:24.04:LTS: freerdp2, Ubuntu:26.04:LTS: freerdp3

FreeRDP before 3.28.0 (affected <=3.27.1) contains a heap-based buffer overflow in crypto_rsa_common() (libfreerdp/crypto/crypto.c). The function writes the modular-exponentiation result into the caller's output buffer via BN_bn2bin() and only afterward checks output_length > out_length, so out-of-bounds bytes are written before the bounds check. On the server side, when a client selects RDP Standard Security, the encrypted client random is decrypted into a fixed 32-byte buffer. Because the server publishes its RSA public key, an unauthenticated attacker can forge a ciphertext whose decrypted value is up to the full modulus length (e.g. 256 bytes for RSA-2048), overflowing the 32-byte heap buffer by up to ~224 attacker-controlled bytes pre-authentication, resulting in denial of service.

Ein Angreifer kann mehrere Schwachstellen in FreeRDP ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, und um Informationen offenzulegen.