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TI-2026-78655 Aliases CVE-2026-114042

Use-after-free in FreeRDP drdynvc channel crashes clients

Priority MEDIUM 64CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

FreeRDP from 3.32.0 before 3.32.1 contains a use-after-free in the drdynvc channel (CWE-416). The code frees a pool-owned stream with the owned-stream deallocator when totalLength is smaller than the chunk size. A malicious RDP server can crash the client during teardown by sending a single well-formed Virtual Channel PDU.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

FreeRDP 3.32.0 contains a use-after-free vulnerability in the drdynvc channel that frees a pool-owned stream with the owned-stream deallocator when totalLength is smaller than the chunk size. A malicious RDP server can send a single well-formed Virtual Channel PDU to trigger the free and crash the client during teardown.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00353 29th percentileScored 2026-11-07
Fix Fixed FreeRDP (FreeRDP): 3.32.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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

VendorProductAffected versionsFixed inStatusSource
FreeRDPFreeRDP3.32.0 to before 3.32.13.32.1Patch availableCNA
  • FreeRDP VendorFreeRDP Affected 3.32.0 to before 3.32.1 Fixed in 3.32.1 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*——FreeRDP
  • cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:* Versions — — ·FreeRDP

Remediation

Update FreeRDP to version 3.32.1, the fixed version.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA FreeRDP (FreeRDP) Fixed in 3.32.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    FreeRDP 3.32.1

    5 records Highest priority Priority MEDIUM 3 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-78656 Out-of-bounds read in FreeRDP clipboard PNG handlingPriority MEDIUM 64
    • TI-2026-78658 Heap buffer overflow in FreeRDP server audio channelPriority MEDIUM 40
    • TI-2026-78657 Heap out-of-bounds read in FreeRDP Android client graphics pipelinePriority LOW 36
    Show all 5 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 5 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-114042
  2. 2026-10-21 Affected versions changed · Red Hat
  3. 2026-10-21 CVSS score added · Red Hat
  4. 2026-10-22 Priority changed: MEDIUM → LOW
  5. 2026-10-22 CISA SSVC decision points changed
  6. 2026-10-22 Priority changed: LOW → MEDIUM

References

Advisory 1

  • 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
See all 346 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences