Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, global-buffer-overflow was observed in FreeRDP's Base64 decoding path. The root cause appears to be implementation-defined char signedness: on Arm/AArch64 builds, plain char is treated as unsigned, so the guard c <= 0 can be optimized into a simple c != 0 check. As a result, non-ASCII bytes (e.g., 0x80-0xFF) may bypass the intended range restriction and be used as an index into a global lookup table, causing out-of-bounds access. This vulnerability is fixed in 3.20.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FreeRDP | FreeRDP | < 3.20.1 | — |
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 14 | freerdp3 | 3.20.2+dfsg-1 | — |
| Debian 13 | freerdp3 | 3.15.0+dfsg-2.1+deb13u1 | — |
| Debian 12 | freerdp2 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | freerdp3 | 3.20.2+dfsg-1 | — |
| Ubuntu 25.10 | freerdp3 | 3.16.0+dfsg-2ubuntu0.3 | USN-8105-1 |
| Ubuntu 24.04 LTS | freerdp3 | 3.5.1+dfsg1-0ubuntu1.4 | USN-8105-1 |
| Ubuntu 22.04 LTS | freerdp2 | No fix yet | — |
| Ubuntu 18.04 LTS | freerdp | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | freerdp | No fix yet | — |
| Ubuntu Pro 24.04 LTS | freerdp2 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | freerdp2 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | freerdp2 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | freerdp +5 | 2:3.10.3-5.el10_1.2 | RHSA-2026:19033, RHSA-2026:3068 |
| RHEL 9 | freerdp +4 | 2:2.11.7-1.el9_7.2 | RHSA-2026:3067 |
| RHEL 8 | freerdp +4 | 2:2.11.7-3.el8_10 | RHSA-2026:3334 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | freerdp +5 | 2:3.10.3-3.el10_0.2 | RHSA-2026:4121 |
| RHEL 9.6 EUS | freerdp +4 | 2:2.11.7-1.el9_6.2 | RHSA-2026:3975 |
| RHEL 9.4 EUS | freerdp +4 | 2:2.11.2-1.el9_4.2 | RHSA-2026:4438 |
| RHEL 9.2 E4S | freerdp +2 | 2:2.4.1-6.el9_2.3 | RHSA-2026:4437 |
| RHEL 9.0 E4S | freerdp +2 | 2:2.4.1-3.el9_0.1 | RHSA-2026:4489 |
| RHEL 8.8 TUS | freerdp +3 | 2:2.2.0-12.el8_8.2 | RHSA-2026:4440 |
| RHEL 8.8 E4S | freerdp +3 | 2:2.2.0-12.el8_8.2 | RHSA-2026:4440 |
| RHEL 8.6 TUS | freerdp +3 | 2:2.2.0-7.el8_6.2 | RHSA-2026:4446 |
| RHEL 8.6 E4S | freerdp +3 | 2:2.2.0-7.el8_6.2 | RHSA-2026:4446 |
| RHEL 8.6 AUS | freerdp +3 | 2:2.2.0-7.el8_6.2 | RHSA-2026:4446 |
| RHEL 8.4 EUS Long Life | freerdp +3 | 2:2.2.0-8.el8_4 | RHSA-2026:4439 |
| RHEL 8.4 AUS | freerdp +3 | 2:2.2.0-8.el8_4 | RHSA-2026:4439 |
| RHEL 8.2 AUS | freerdp +3 | 2:2.0.0-46.rc4.el8_2.7 | RHSA-2026:4433 |
| RHEL 7 ELS | freerdp +4 | 2.1.1-5.el7_9.2 | RHSA-2026:4471 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | freerdp +5 | 2:3.10.3-5.el10_1.2 | ALSA-2026:3068 |
| AlmaLinux 9 | freerdp +4 | 2:2.11.7-1.el9_7.2 | ALSA-2026:3067 |
| AlmaLinux 8 | freerdp +4 | 2:2.11.7-3.el8_10 | ALSA-2026:3334 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | freerdp | 2:3.10.3-5.el10_1.2 | RLSA-2026:3068 |
| Rocky Linux 9 | freerdp | 2:2.11.7-1.el9_7.2 | RLSA-2026:3067 |
| Rocky Linux 8 | freerdp | 2:2.11.7-3.el8_10 | RLSA-2026:3334 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | freerdp | 3.10.3-150700.3.3.1 | SUSE-SU-2026:0345-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | freerdp | 3.20.2-1.1 | openSUSE-SU-2026:10059-1 |
| openSUSE Leap 16.0 | freerdp | 3.22.0-160000.1.1 | openSUSE-SU-2026:20339-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | freerdp | 3.22.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | freerdp +5 | 2:3.6.3-1.amzn2023.0.3 | ALAS2023-2026-1433 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | freerdp +5 | 2:3.10.3-5.el10_1.2 | ELSA-2026-19033, ELSA-2026-3068 |
| Oracle Linux 9 | freerdp +4 | 2:2.11.7-1.el9_7.2 | ELSA-2026-3067 |
| Oracle Linux 8 | freerdp +4 | 2:2.11.7-3.el8_10 | ELSA-2026-3334 |
| Oracle Linux 7 | freerdp +4 | 2.1.1-5.0.3.el7_9 | ELSA-2026-4471 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | freerdp-dev +1 | No fix yet | — |
Advisories 31
- ALSA-2026:3068 Important: freerdp security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:3067 Important: freerdp security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:3334 Important: freerdp security update AlmaLinux Security Advisories · Oct 29, 2026
- USN-8105-1 freerdp3 vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- RHSA-2026:19033 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Oct 7, 2026
- WID-SEC-2026-0111 FreeRDP: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 28, 2026
- RHSA-2026:4489 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- RHSA-2026:4471 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- RHSA-2026:4446 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- RHSA-2026:4440 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- RHSA-2026:4439 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- RHSA-2026:4437 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- RHSA-2026:4438 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- RHSA-2026:4433 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- RHSA-2026:4121 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- RHSA-2026:3975 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- RHSA-2026:3334 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- RHSA-2026:3068 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- RHSA-2026:3067 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Aug 19, 2026
- ELSA-2026-19033 Important: freerdp security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 8, 2026
- ELSA-2026-4471 Important: freerdp security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 27, 2026
- openSUSE-SU-2026:20339-1 Security update for freerdp SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10059-1 freerdp-3.20.2-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- RLSA-2026:3334 Important: freerdp security update Rocky Linux Security Advisories · Feb 26, 2026
- ELSA-2026-3334 Important: freerdp security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 25, 2026
- RLSA-2026:3067 Important: freerdp security update Rocky Linux Security Advisories · Feb 24, 2026
- RLSA-2026:3068 Important: freerdp security update Rocky Linux Security Advisories · Feb 24, 2026
- ELSA-2026-3068 Important: freerdp security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Feb 23, 2026
- ELSA-2026-3067 Important: freerdp security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Feb 23, 2026
- ALAS2023-2026-1433 Moderate: freerdp security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 18, 2026
- SUSE-SU-2026:0345-1 Security update for freerdp SUSE / openSUSE Security Updates · Feb 4, 2026