Description
FreeRDP versions from 2.0.0 before 3.32.0 contain a heap out-of-bounds write in the server hash-callback NTLM path that fails to validate the MIC offset. Unauthenticated attackers can send a crafted AUTHENTICATE_MESSAGE with a backward session-key offset and MIC offset to write 16 zero bytes beyond the allocation.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FreeRDP | FreeRDP | 2.0.0 – < 3.32.0 | 3.32.0 |
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 | 3.32.0+dfsg-1 | — |
| Debian 13 | freerdp3 | No fix yet | — |
| Debian 12 | freerdp2 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | freerdp3 | 3.32.0+dfsg-0ubuntu0.26.04.1 | — |
| Ubuntu 24.04 LTS | freerdp3 | 3.32.0+dfsg-0ubuntu0.24.04.1 | — |
| Ubuntu 22.04 LTS | freerdp2 | No fix yet | — |
| Ubuntu 18.04 LTS | freerdp | No fix yet | — |
| Ubuntu 16.04 LTS | freerdp | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 | 2:3.32.2-1.el10_2 | RHSA-2026:98598, RHSA-2026:94514 |
| RHEL 9 | freerdp +4 | 2:2.11.7-7.el9_8.9 | RHSA-2026:98508, RHSA-2026:93592 |
| RHEL 8 | freerdp +4 | 2:2.11.7-15.el8_10 | RHSA-2026:94510 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | freerdp +5 | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| AlmaLinux 9 | freerdp +4 | 2:2.11.7-7.el9_8.9 | ALSA-2026:93592 |
| AlmaLinux 8 | freerdp +4 | 2:2.11.7-15.el8_10 | ALSA-2026:94510 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | freerdp +5 | 2:3.32.2-1.el10_2 | RLSA-2026:98598, RLSA-2026:94514 |
| Rocky Linux 9 | freerdp | 2:2.11.7-7.el9_8.9 | RLSA-2026:98508, RLSA-2026:93592 |
| Rocky Linux 9 | libwinpr +3 | 2:2.11.7-13.el9_9.3 | RLSA-2026:98508 |
| Rocky Linux 8 | freerdp | 2:2.11.7-15.el8_10 | RLSA-2026:94510 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | freerdp +5 | 2:3.32.1-1.amzn2023.0.1 | ALAS2023-2026-3307 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | freerdp +5 | 2:3.32.2-1.el10_2 | ELSA-2026-94514 |
| Oracle Linux 9 | freerdp +4 | 2:2.11.7-7.el9_8.9 | ELSA-2026-93592 |
| Oracle Linux 8 | freerdp +4 | 2:2.11.7-15.el8_10 | ELSA-2026-94510 |
Advisories 18
- RHSA-2026:98598 Red Hat Security Advisory: freerdp security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:98508 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:94514 Red Hat Security Advisory: freerdp security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:94510 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:93592 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- ALSA-2026:94514 Important: freerdp security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 13, 2026
- RLSA-2026:98598 Critical: freerdp security, bug fix, and enhancement update Rocky Linux Security Advisories · Nov 13, 2026
- RLSA-2026:98508 Important: freerdp security update Rocky Linux Security Advisories · Nov 13, 2026
- WID-SEC-2026-3535 FreeRDP: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Nov 11, 2026
- ALSA-2026:94510 Important: freerdp security update AlmaLinux Security Advisories · Nov 4, 2026
- RLSA-2026:94510 Important: freerdp security update Rocky Linux Security Advisories · Nov 4, 2026
- RLSA-2026:94514 Important: freerdp security, bug fix, and enhancement update Rocky Linux Security Advisories · Nov 4, 2026
- RLSA-2026:93592 Important: freerdp security update Rocky Linux Security Advisories · Nov 3, 2026
- ALSA-2026:93592 Important: freerdp security update AlmaLinux Security Advisories · Nov 3, 2026
- ELSA-2026-94514 Important: freerdp security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Nov 3, 2026
- ELSA-2026-94510 Important: freerdp security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 3, 2026
- ELSA-2026-93592 Important: freerdp security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 2, 2026
- ALAS2023-2026-3307 Important: freerdp security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 26, 2026
References
- GitHub Security Advisory (GHSA-cmgx-558f-vh67) vendor-advisory
- VulnCheck Advisory: FreeRDP 2.0.0 before 3.32.0 Heap Out-of-Bounds Write via NTLM MIC Offset third-party-advisory