SB2026021005 - Multiple vulnerabilities in FreeRDP

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026021005

SB2026021005 - Multiple vulnerabilities in FreeRDP

Published: February 10, 2026 Updated: May 4, 2026

Security Bulletin ID SB2026021005
CSH Severity
High
Patch available
YES
Number of vulnerabilities 13
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 85% Medium 8% Low 8%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 13 vulnerabilities.


1) NULL pointer dereference (CVE-ID: CVE-2026-23948)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in rdp_write_logon_info_v2(). A remote attacker can trick the victim into connecting to a malicious server and crash the application.


2) Use-after-free (CVE-ID: CVE-2026-24680)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in update_pointer_new(SDL) function. A remote attacker can trick the victim into connecting to a malicious server and execute arbitrary code on the system.

3) Use-after-free (CVE-ID: CVE-2026-24491)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in video_timer() function. A remote attacker can trick the victim into connecting to a malicious server and execute arbitrary code on the system.

4) Use-after-free (CVE-ID: CVE-2026-24675)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in urb_select_interface() function. A remote attacker can trick the victim into connecting to a malicious server and execute arbitrary code on the system.

5) Use-after-free (CVE-ID: CVE-2026-24681)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in urb_bulk_transfer_cb() function. A remote attacker can trick the victim into connecting to a malicious server and execute arbitrary code on the system.

6) Heap-based buffer overflow (CVE-ID: CVE-2026-24679)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in urb_select_interface() function. A remote attacker can trick the victim into connecting to a malicious server, trigger a heap-based buffer overflow and execute arbitrary code on the target system.


7) Use-after-free (CVE-ID: CVE-2026-24684)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in play_thread() function. A remote attacker can trick the victim into connecting to a malicious server and execute arbitrary code on the system.

8) Use-after-free (CVE-ID: CVE-2026-24678)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in cam_v4l_stream_capture_thread() function. A remote attacker can trick the victim into connecting to a malicious server and execute arbitrary code on the system.

9) Heap-based buffer overflow (CVE-ID: CVE-2026-24677)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in ecam_encoder_compress_h264() function. A remote attacker can trick the victim into connecting to a malicious server, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

10) Use-after-free (CVE-ID: CVE-2026-24676)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in audio_format_compatible() function. A remote attacker can trick the victim into connecting to a malicious server and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.


11) Use-after-free (CVE-ID: CVE-2026-24683)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in ainput_send_input_event() function. A remote attacker can trick the victim into connecting to a malicious server and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.


12) Heap-based buffer overflow (CVE-ID: CVE-2026-24682)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in audio_formats_free() function. A remote attacker can trick the victim into connecting to a malicious server, trigger a heap-based buffer overflow and execute arbitrary code on the target system.



13) Use-after-free (CVE-ID: N/A)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service and potentially execute arbitrary code.

The vulnerability exists due to use-after-free in the drdynvc client channel callback handling in channels/drdynvc/client/drdynvc_main.c when processing concurrent DYNVC_DATA and server-driven DYNVC_CLOSE messages on the same dynamic virtual channel. A remote attacker can send specially crafted dynamic virtual channel messages to cause a denial of service and potentially execute arbitrary code.

The issue is reachable when a FreeRDP client connects to a malicious or compromised RDP server, and drdynvc is enabled by default.


Remediation

Install update from vendor's website.

References