PT-2026-2936 · Freerdp+4 · Freerdp+4

Ehdgks0627 · Published 2025-01-14 · Updated 2026-06-11 · CVE-2026-22856

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions FreeRDP versions prior to 3.20.1

Description A race condition exists in the serial channel IRP thread tracking of FreeRDP, potentially leading to a heap use-after-free. This occurs when one thread removes an entry from serial->IrpThreads while another thread is reading it.

Recommendations Update to version 3.20.1 or later.

Exploit

Fix

DoS

Use After Free

Race Condition

Weakness Enumeration

CWE-416

CWE-362

Related Identifiers

ALSA-2026:6340

ALSA-2026:6799

ALSA-2026:6918

BDU:2026-00627

CVE-2026-22856

GHSA-W842-C386-FXHV

MGASA-2026-0086

OESA-2026-1516

OESA-2026-1517

OESA-2026-1518

OESA-2026-1519

OESA-2026-1520

OESA-2026-1521

OPENSUSE-SU-2026:10059-1

OPENSUSE-SU-2026:10176-1

OPENSUSE-SU-2026:20320-1

OPENSUSE-SU-2026:20339-1

RHSA-2026:10076

RHSA-2026:10734

RHSA-2026:10735

RHSA-2026:10951

RHSA-2026:11323

RHSA-2026:6340

RHSA-2026:6727

RHSA-2026:6743

RHSA-2026:6799

RHSA-2026:6918

RHSA-2026:6958

RHSA-2026:9640

RHSA-2026:9641

SUSE-SU-2026:0345-1

SUSE-SU-2026:0417-1

SUSE-SU-2026:0421-1

SUSE-SU-2026:0449-1

SUSE-SU-2026:0559-1

USN-8105-1

Affected Products

Freerdp

Linuxmint

Red Os

Rocky Linux

Ubuntu

References · 240

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22856.json · Exploit
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w842-c386-fxhv · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2026:6799 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:20339-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23532 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2026-0086 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-26965 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23534 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-22852 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:0417-1 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2026:6340 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23531 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0345-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-22859 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-22856 · Vendor Advisory