==========================================================================
Ubuntu Security Notice USN-8042-1
February 16, 2026

freerdp2, freerdp3 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in FreeRDP.

Software Description:
- freerdp3: RDP client for Windows Terminal Services
- freerdp2: RDP client for Windows Terminal Services

Details:

It was discovered that FreeRDP incorrectly handled memory under certain
circumstances, which could lead to a NULL pointer dereference. An
attacker could possibly use this issue to cause a denial of service.
(CVE-2026-23948)

It was discovered that FreeRDP did not correctly validate the size of
certain variables, which could cause a buffer overflow. An attacker could
possibly use this issue to cause a denial of service or execute arbitrary
code. This issue only affected FreeRDP3 in Ubuntu 24.04 LTS and Ubuntu
25.10. (CVE-2026-24491)

It was discovered that FreeRDP did not correctly validate the size of
certain variables, which could cause a buffer overflow. An attacker could
possibly use this issue to cause a denial of service or execute arbitrary
code. (CVE-2026-24675, CVE-2026-24679, CVE-2026-24682)

It was discovered that FreeRDP had a use after free vulnerability under
certain circumstances. An attacker could use this to cause a denial of
service or possibly execute arbitrary code. (CVE-2026-24676,
CVE-2026-24681)

It was discovered that FreeRDP did not correctly validate the size of
certain variables, which could cause a buffer overflow. An attacker could
possibly use this issue to cause a denial of service or execute arbitrary
code. This issue only affected Ubuntu 25.10. (CVE-2026-24677)

It was discovered that FreeRDP had a use after free vulnerability under
certain circumstances. An attacker could use this to cause a denial of
service or possibly execute arbitrary code. This issue only affected
Ubuntu 25.10. (CVE-2026-24678)

It was discovered that FreeRDP had a use after free vulnerability under
certain circumstances. An attacker could use this to cause a denial of
service or possibly execute arbitrary code. This issue only affected
FreeRDP3 in Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2026-24680)

It was discovered that FreeRDP had a use after free vulnerability under
certain circumstances. An attacker could use this to cause a denial of
service or possibly execute arbitrary code. This issue only affected
Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.10.
(CVE-2026-24683, CVE-2026-24684)

Update instructions:

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

Ubuntu 25.10
  freerdp3-x11                    3.16.0+dfsg-2ubuntu0.1
  libfreerdp3-3                   3.16.0+dfsg-2ubuntu0.1

Ubuntu 24.04 LTS
  freerdp2-x11                    2.11.5+dfsg1-1ubuntu0.1~esm5
                                  Available with Ubuntu Pro
  freerdp3-x11                    3.5.1+dfsg1-0ubuntu1.2
  libfreerdp2-2t64                2.11.5+dfsg1-1ubuntu0.1~esm5
                                  Available with Ubuntu Pro
  libfreerdp3-3                   3.5.1+dfsg1-0ubuntu1.2

Ubuntu 22.04 LTS
  freerdp2-x11                    2.6.1+dfsg1-3ubuntu2.10
  libfreerdp2-2                   2.6.1+dfsg1-3ubuntu2.10

Ubuntu 20.04 LTS
  freerdp2-x11                    2.6.1+dfsg1-0ubuntu0.20.04.2+esm3
                                  Available with Ubuntu Pro
  libfreerdp2-2                   2.6.1+dfsg1-0ubuntu0.20.04.2+esm3
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  freerdp2-x11                    2.2.0+dfsg1-0ubuntu0.18.04.4+esm5
                                  Available with Ubuntu Pro
  libfreerdp2-2                   2.2.0+dfsg1-0ubuntu0.18.04.4+esm5
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-8042-1
  CVE-2026-23948, CVE-2026-24491, CVE-2026-24675, CVE-2026-24676,
  CVE-2026-24677, CVE-2026-24678, CVE-2026-24679, CVE-2026-24680,
  CVE-2026-24681, CVE-2026-24682, CVE-2026-24683, CVE-2026-24684

Package Information:
  https://launchpad.net/ubuntu/+source/freerdp3/3.16.0+dfsg-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/freerdp2/2.6.1+dfsg1-3ubuntu2.10