FreeRDP before 3.32.2 X11 Client Crash via Zero-Width RDPGFX ResetGraphics
Affects FreeRDP before 3.32.2 only when a Linux xfreerdp X11 client connects to a malicious RDP server. The CVSS score is 7.1 (high); no vendor rating is given. Fixed in 3.32.2.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 3.32.2
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Linux xfreerdp X11 client connected to a malicious RDP server Server sends an RDPGFX ResetGraphics PDU with width zero, followed by a normal bitmap update FreeRDP versions before 3.32.2
- Exploitation?/40Exploitation: unknown (data gap). No CISA SSVC exploitation rating yet
- Exposure12/25Specific setups only, reachable over the network without a login
- Reach?/20Reach: unknown (data gap). No tracked technology or package matched
- Severity7.1/10CVSS 7.1
- No patch0/5No signal
What would change the score
- Would score about 69 if added to CISA KEV
- Would score about 64 if CISA's SSVC rates exploitation active
CVE-2026-121402 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.1 (high) and affects FreeRDP; fixed in 3.32.2.
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- Published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 19/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Fix
- Fixed in 3.32.2
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
FreeRDP, a remote desktop client library, and the xfreerdp X11 client are affected. A malicious remote desktop server can crash the client by sending a specially crafted display reset, causing a denial of service.
Read the original description
FreeRDP before 3.32.2 contains a NULL pointer dereference vulnerability that allows malicious RDP servers to crash xfreerdp clients by sending a zero-width RDPGFX ResetGraphics PDU. The failed resize in gdi_resize_ex leaves the primary display null without ending the session, so a later bitmap update crashes the client in gdi_Bitmap_Paint.
What to do
Check whether your setup matches what the bug needs.
Linux xfreerdp X11 client connected to a malicious RDP server Server sends an RDPGFX ResetGraphics PDU with width zero, followed by a normal bitmap update FreeRDP versions before 3.32.2Upgrade to a fixed version: 3.32.2.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- FreeRDP FreeRDP
fixed in 3.32.2
Evidence 2
- Advisory
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-121402
Is CVE-2026-121402 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
A malicious RDP server can send a ResetGraphics PDU with width zero, followed by a normal bitmap update, and this crashes a connected Linux xfreerdp client. The demonstrated impact is loss of client availability; no code execution or information disclosure was shown.Source: github.com, vulncheck.com
Which versions are affected by CVE-2026-121402?
FreeRDP: before 3.32.2.Source: cve.now feed data
Am I affected, and how do I check?
FreeRDP versions before 3.32.2 are affected, but only when the Linux xfreerdp X11 client is connected to a malicious RDP server that sends the zero-width ResetGraphics sequence. To check a version, run xfreerdp /version and compare the number with 3.32.2.Source: github.com, vulncheck.com
How do I fix CVE-2026-121402?
Upgrade FreeRDP to version 3.32.2 or later, which contains the fix. No other fixed versions are listed in the facts.Source: github.com, vulncheck.com