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Ubuntu 25.10 xrdp Critical DoS Arbitrary Code Vuln USN-8476-1

ubuntu
Calendar Grey June 25, 2026
Dist Ubuntu Esm H88
Multiple security fixes for xrdp enhance protection against denial of service and session issues in Ubuntu. Keep systems secure!
Several security issues were fixed in xrdp.

Summary

Several security issues were fixed in xrdp.

Software Description:

- xrdp: an open source RDP server

Details:

It was discovered that xrdp incorrectly handled bounds checking when

processing user domain information during the connection sequence. An

unauthenticated remote attacker could use this issue to cause xrdp to

crash, resulting in a denial of service, or possibly execute arbitrary

code. (CVE-2025-68670)

It was discovered that xrdp did not correctly enforce the maximum number of

login attempts configured by the MaxLoginRetry parameter. A remote attacker

could use this issue to perform an unlimited number of login attempts.

(CVE-2024-39917)

It was discovered that xrdp did not perform bounds checking when accessing

font glyphs. Since some of this data is controllable by the user, a remote

attacker could use this issue to cause xrdp to read out of bounds. This

issue only affected Ubuntu 24.04 LTS. (CVE-2023-42822)

It was discovered that xrdp did not properly handle session e...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu arbitrary code xrdp session restriction

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  xrdp                            0.10.1-3.1+deb13u1build0.25.10.1

Ubuntu 24.04 LTS
  xrdp                            0.9.24-4ubuntu0.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 22.04 LTS
  xrdp                            0.9.17-2ubuntu3+esm2
                                  Available with Ubuntu Pro

Ubuntu 20.04 LTS
  xrdp                            0.9.12-1ubuntu0.1+esm2
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  xorgxrdp                        0.9.5-2ubuntu0.1~esm3
                                  Available with Ubuntu Pro
  xrdp                            0.9.5-2ubuntu0.1~esm3
                                  Available with Ubuntu Pro
  xrdp-pulseaudio-installer       0.9.5-2ubuntu0.1~esm3
                                  Available with Ubuntu Pro

After a standard system update you need to restart xrdp to make all the
necessary changes.

References

https://ubuntu.com/security/notices/USN-8476-1

CVE-2023-40184, CVE-2023-42822, CVE-2024-39917, CVE-2025-68670

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8476-1

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu arbitrary code xrdp session restriction

Package Information

https://launchpad.net/ubuntu/+source/xrdp/0.10.1-3.1+deb13u1build0.25.10.1

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