NULL dereference in FreeRDP video redirection crashes clients
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Partial Red Hat: 5 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-476.
Summary
FreeRDP before 3.32.0 contains a NULL pointer dereference (CWE-476) in its client video redirection channel. A malicious server can send out-of-order messages: a Geometry CLEAR message nulls presentation->geometry, and a following VideoData message dereferences it. This crashes the client, causing a denial of service.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
FreeRDP before 3.32.0 contains a NULL pointer dereference vulnerability in the client video redirection channel that allows malicious servers to crash clients by sending out-of-order messages. Attackers can send a Geometry CLEAR message that nulls presentation->geometry, then send VideoData that dereferences it, causing client denial of service.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
Update FreeRDP to version 3.32.0, which fixes the flaw. Red Hat has no fix yet for Red Hat Enterprise Linux 6, 7, 8, 9 and 10.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
- Fix · CNA FreeRDP (FreeRDP) Fixed in 3.32.0
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
FreeRDP 3.32.0
15 records Highest priority Priority HIGH 3 HIGH, 8 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2026-71073 Double free in FreeRDP NSCodec context initializationPriority HIGH 69
- TI-2026-71061 Improper certificate validation in FreeRDP HTTP requestsPriority HIGH 68
- TI-2026-71066 Heap buffer overflow in FreeRDP PKCS#11 key enumerationPriority HIGH 66
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-12 Threatist record created from CVE-2026-109241
- 2026-10-12 Alias added: GHSA-rc7m-h6pj-rgg2
- 2026-10-13 Affected versions changed · Red Hat
- 2026-10-13 CVSS score added · Red Hat
- 2026-10-15 Affected versions changed · Red Hat
- 2026-10-18 CISA SSVC decision points changed
References
More Freerdp vulnerabilities
- TI-2026-85092 Use-after-free in FreeRDP rdpgfx channel close handling CVSS 4.0CRITICAL 9.3
- TI-2026-85091 Out-of-bounds write in FreeRDP proxy via bitmap cache v2 capability CVSS 4.0CRITICAL 9.3
- TI-2026-24435 FreeRDP has a `size_t` underflow in ADPCM decoder leads to heap-buffer-overflow write CVSS 3.1CRITICAL 9.8
- TI-2023-21373 Out-Of-Bounds Write in FreeRDP CVSS 3.1CRITICAL 9.8
- TI-2022-08692 Server side NTLM does not properly check parameters in FreeRDP CVSS 3.1CRITICAL 9.1
- TI-2023-21374 Out-Of-Bounds Read in FreeRDP CVSS 3.1CRITICAL 9.1
Sources
- CVE-2026-109241 · CVE Program
- CVE-2026-109241 · NVD
- FIRST EPSS
- GHSA-rc7m-h6pj-rgg2 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-109241 · Red Hat security data · CC BY 4.0
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