Heap-based buffer overflow in xrdp - CVE-2026-41252
Published: July 2, 2026
Vulnerability identifier: #VU136789
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-41252
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to heap-based buffer overflow in RFB protocol color map message handling in xrdp vnc-any mode when processing crafted color map messages from a VNC server. A remote attacker can send specially crafted messages with out-of-range color indices to execute arbitrary code.
The issue can also result in a denial of service and can be exploited prior to authentication.
Affected software
xrdp
Debian Linux
Fedora
xrdp (Debian package)
xrdp
Debian Linux
Fedora
xrdp (Debian package)
xrdp
How to mitigate CVE-2026-41252
Install security update from vendor's website.
xrdp - update to 0.10.6.1
xrdp (Debian package) - update to 0.10.1-3.1+deb13u2
xrdp - addressed in versions 0.10.6.1-1.el8, 0.10.6.1-1.el9, 0.10.6.1-1.fc43, 0.10.6.1-1.fc44
xrdp (Debian package) - update to 0.10.1-3.1+deb13u2
xrdp - addressed in versions 0.10.6.1-1.el8, 0.10.6.1-1.el9, 0.10.6.1-1.fc43, 0.10.6.1-1.fc44