CVE-2026-55238

xrdp: xrdp is an open source RDP server

CVE-2026-55238 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: Routine.

Routine
CVSS
5.3
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0052
44th percentile

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of RDP Confirm Active PDU, where during the capability negotiation phase, the parser did not perform sufficient length validation for specific capability sets. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted RDP packet containing malformed capability data. Due to missing bounds checks, the xrdp process may perform out-of-bounds memory reads, which can result in the termination of the service (Denial of Service). However, since xrdp forks a new process for each connection by default, an out-of-bounds read causing a process crash is unlikely to bring down the entire xrdp service. 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-2026-55238 Aug 1, 2026
xrdp · Debian 13.5 (trixie) 0.10.1-3.1+deb13u2 DEBIAN-CVE-2026-55238 Aug 1, 2026
xrdp · Debian 14 0.10.6.1-2 DEBIAN-CVE-2026-55238 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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