CVSS 4.0
9.3 criticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCVE-2026-121953 freerdp freerdp: Use After Free
Critical (9.3) in freerdp freerdp. EPSS 0.6% estimated probability of exploitation activity in the next 30 days.
On this page
FreeRDP before 3.32.2 has a use-after-free in the client's rdpgfx dynamic virtual channel: a duplicate-name channel with a new ChannelId overwrites the listener's single callback slot, which rdpgfx_on_close frees without clearing. A malicious RDP server can open and close such a channel, then send a PDU on the original channel to crash the client or potentially execute code.
Severity
CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- EPSS
- 0.6% (unchanged from 0.6% a week ago) estimated probability of exploitation activity in the next 30 days; 47th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: PoC · Automatable: yes · Technical impact: total, assessed 2026-11-04. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-416 Use After Free
- Published
- Modified
- NVD analysis
- Analyzed
- Record from
- the NVD, synced
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Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| FreeRDP | before 3.32.2 |
Fix and patched versions
- Debian, Red Hat, AlmaLinux, Rocky Linux: fixed package versions per release
- Vendor advisory: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6wqx-rv3q-vcxp
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Debian | 12 | freerdp2 | no fix listed | DEBIAN-CVE-2026-121953 |
| Debian | 13 | freerdp3 | no fix listed | DEBIAN-CVE-2026-121953 |
| Debian | 14 | freerdp3 | 3.32.2+dfsg-1 | DEBIAN-CVE-2026-121953 |
| Ubuntu | 16.04:LTS, 18.04:LTS | freerdp | no fix listed | UBUNTU-CVE-2026-121953 |
| Red Hat | enterprise_linux:10.2 | freerdp, libwinpr, freerdp-libs and 8 more | 2:3.32.2-1.el10_2 | RHSA-2026:94514 |
| Red Hat | enterprise_linux:10.3 | freerdp, libwinpr, freerdp-libs and 8 more | 2:3.32.2-1.el10_3 | RHSA-2026:98598 |
| AlmaLinux | 10 | freerdp, libwinpr, freerdp-libs and 3 more | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| Rocky Linux | 10 | freerdp, libwinpr, freerdp-libs and 8 more | 2:3.32.2-1.el10_2 | RLSA-2026:98598 |
From the distributions' data via OSV.dev: the Debian Security Tracker; Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0; Red Hat Security Data © Red Hat, Inc., CC BY 4.0; AlmaLinux's OSV database, MIT; Rocky Linux's errata, BSD-3-Clause. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian · Ubuntu · Red Hat.
Red Hat
Red Hat rates this Important.
This vulnerability is rated Important rather than Critical because exploitation requires a user to initiate a connection to a malicious or compromised RDP server. Once connected with the graphics pipeline enabled, a hostile server can trigger a use-after-free in the FreeRDP client process that may allow code execution with the privileges of the client user. Standard Red Hat Enterprise Linux hardening such as ASLR, NX, FORTIFY_SOURCE, and glibc allocator protections may impede reliable code execution but does not remove the denial-of-service impact from a client crash.
Restrict FreeRDP client connections to trusted RDP servers and enforce server certificate verification. Avoid connecting to untrusted remote desktop endpoints.
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | freerdp | Affected | |
| Red Hat Enterprise Linux 6 | freerdp | Not affected | |
| Red Hat Enterprise Linux 7 | freerdp | Affected | |
| Red Hat Enterprise Linux 8 | freerdp | Affected | |
| Red Hat Enterprise Linux 9 | freerdp | Affected |
Contains Red Hat Security Data © Red Hat, Inc., licensed under CC BY 4.0. Source: https://access.redhat.com/security/data. Modified: reformatted. Red Hat's page for CVE-2026-121953.