CVE-2026-54538

xrdp: xrdp is an open source RDP server

CVE-2026-54538 is fixed in 5 products on 1 platform, first by FEDORA-2026-952A486B39, released July 17, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.5
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0067
52nd percentile

xrdp is an open source RDP server. In versions 0.10.6 and prior, a n issue was discovered where the software fails to properly validate the totalLength field within the RDP protocol control header during packet reception. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted packet that forces the xrdp process or thread into an infinite, CPU-bound loop. Because the internal pointer fails to advance and the deadlock prevention mechanism is bypassed for specific protocol data unit types, the process consumes excessive CPU resources indefinitely. This can render the xrdp service unavailable and potentially lead to system-wide resource exhaustion if multiple malicious connections are established. This issue has been fixed in version 0.10.6.1.

Where it's fixed

ProductFixed inFixReleased
Linux
xrdp · Debian 12.15 (bookworm) 0.9.21.1-1+deb12u3 DEBIAN-CVE-2026-54538 Aug 1, 2026
xrdp · Debian 13.5 (trixie) 0.10.1-3.1+deb13u2 DEBIAN-CVE-2026-54538 Aug 1, 2026
xrdp · Debian 14 0.10.6.1-2 DEBIAN-CVE-2026-54538 Aug 1, 2026
xrdp · Fedora 43 1:0.10.6.1-3.fc43 FEDORA-2026-952A486B39 Jul 17, 2026
xrdp-debuginfo · Fedora 43 1:0.10.6.1-3.fc43 FEDORA-2026-952A486B39 Jul 17, 2026
xrdp-debugsource · Fedora 43 1:0.10.6.1-3.fc43 FEDORA-2026-952A486B39 Jul 17, 2026
xrdp-devel · Fedora 43 1:0.10.6.1-3.fc43 FEDORA-2026-952A486B39 Jul 17, 2026
xrdp-selinux · Fedora 43 1:0.10.6.1-3.fc43 FEDORA-2026-952A486B39 Jul 17, 2026

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