Description
FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP based clients that use a version of FreeRDP prior to 3.5.0 or 2.11.6 and have connections to servers using the `NSC` codec are vulnerable to integer underflow. Versions 3.5.0 and 2.11.6 patch the issue. As a workaround, do not use the NSC codec (e.g. use `-nsc`).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FreeRDP | FreeRDP | >= 3.0.0, 3.5.0, < 2.11.6 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 12 | freerdp2 | 2.11.7+dfsg1-6~deb12u1 | — |
| Debian 11 | freerdp2 | 2.3.0+dfsg1-2+deb11u2 | DLA-4053-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | freerdp3 | 3.5.0+dfsg1-0ubuntu1 | — |
| Ubuntu 22.04 LTS | freerdp2 | 2.6.1+dfsg1-3ubuntu2.6 | USN-6749-1 |
| Ubuntu 20.04 LTS | freerdp2 | 2.6.1+dfsg1-0ubuntu0.20.04.1 | USN-6749-1 |
| Ubuntu 18.04 LTS | freerdp | No fix yet | — |
| Ubuntu 16.04 LTS | freerdp | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | freerdp2 | 2.11.5+dfsg1-1ubuntu0.1~esm1 | USN-7341-1 |
| Ubuntu Pro 18.04 LTS | freerdp2 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | freerdp +4 | 2:2.11.7-1.el9 | RHSA-2024:9092 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | freerdp | 2.4.0-150400.3.29.1 | SUSE-SU-2024:1610-1 |
| SLES 12 SP5 | freerdp | 2.1.2-12.44.1 | SUSE-SU-2024:1609-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | freerdp | 3.5.1-1.1 | openSUSE-SU-2024:13900-1 |
| openSUSE Tumbleweed | freerdp2 | 2.11.7-1.1 | openSUSE-SU-2024:14022-1 |
| openSUSE Leap 16.0 | freerdp | 3.22.0-160000.1.1 | openSUSE-SU-2026:20339-1 |
| openSUSE Leap 15.5 | freerdp | 2.4.0-150400.3.29.1 | SUSE-SU-2024:1610-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | freerdp +4 | 2:2.11.7-1.amzn2.0.1 | ALAS2-2024-2537 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | freerdp +4 | 2:2.11.7-1.el9 | ELSA-2024-9092 |
Advisories 12
- RHSA-2024:9092 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-7341-1 freerdp2 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-6749-1 freerdp2 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- openSUSE-SU-2026:20339-1 Security update for freerdp SUSE / openSUSE Security Updates · Mar 23, 2026
- WID-SEC-2024-0905 FreeRDP: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Mar 11, 2026
- DLA-4053-1 freerdp2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2024:1610-1 Security update for freerdp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1609-1 Security update for freerdp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13900-1 freerdp-3.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14022-1 freerdp2-2.11.7-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2024-9092 Moderate: freerdp security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 14, 2024
- ALAS2-2024-2537 Moderate: freerdp security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 6, 2024
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-23c5-cp23-h2h5
- https://github.com/FreeRDP/FreeRDP/pull/10077
- https://github.com/FreeRDP/FreeRDP/releases/tag/2.11.6
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.5.0
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZKI4UISUXYNBPN4K6TIQKDRTIJ6CDCKJ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7SIS6NUNLUBOV4CPCSWKDE6T6C2W3WTR/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PX3U6YPZQ7PEJBVKSBUOLWVH7DHROHY5/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5JL476WVJSIE7SBUKVJRVA6A52V2HOLZ/