Out-of-bounds read in FreeRDP - CVE-2026-22858

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Main Vulnerability Database Vulnerabilities #VU122509

Out-of-bounds read in FreeRDP - CVE-2026-22858

Published: February 10, 2026


Vulnerability identifier: #VU122509
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-22858
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a boundary condition within the crypto_base64_decode() function. A remote attacker can trick the victim into connecting to a malicious server, trigger an out-of-bounds read error and crash the application.


Affected software

FreeRDP
Anolis OS
Red Hat CodeReady Linux Builder for IBM z Systems
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Ubuntu
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
freerdp (Red Hat package)
freerdp2 (Ubuntu package)
freerdp-libs
freerdp
freerdp-doc
libwinpr-devel
libwinpr
freerdp-devel
freerdp3 (Ubuntu package)

How to mitigate CVE-2026-22858

Install updates from vendor's website.

FreeRDP - update to 3.20.1
freerdp (Red Hat package) - addressed in versions 2.0.0-46.rc4.el8_2.7, 2.2.0-7.el8_6.2, 2.2.0-8.el8_4, 2.2.0-12.el8_8.2, 2.4.1-3.el9_0.1, 2.4.1-6.el9_2.3, 2.11.2-1.el9_4.2, 2.11.7-1.el9_7.2, 2.11.7-3.el8_10, 3.10.3-3.el10_0.2, 3.10.3-5.el10_1.2
freerdp2 (Ubuntu package) - addressed in versions 2.2.0+dfsg1-0ubuntu0.18.04.4+esm6, 2.6.1+dfsg1-0ubuntu0.20.04.2+esm4, 2.6.1+dfsg1-3ubuntu2.11, 2.11.5+dfsg1-1ubuntu0.1~esm6, 3.5.1+dfsg1-0ubuntu1.6, 3.16.0+dfsg-2ubuntu0.5, 3.24.2+dfsg-1ubuntu1.1
freerdp-libs - update to 2.11.7-3.0.1
freerdp - update to 2.11.7-3.0.1
freerdp-doc - update to 2.11.7-3.0.1
libwinpr-devel - update to 2.11.7-3.0.1
libwinpr - update to 2.11.7-3.0.1
freerdp-devel - update to 2.11.7-3.0.1
freerdp3 (Ubuntu package) - addressed in versions 3.5.1+dfsg1-0ubuntu1.4, 3.16.0+dfsg-2ubuntu0.3

External References

Related Security Bulletins