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TI-2026-84277 Aliases CVE-2026-121395GHSA-6qj6-xh5j-jwj9

FreeRDP Denial of Service via RemoteFX Decoder Assertion Failure

Priority LOW 31CWE-617Published · 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
Partial Red Hat: 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-617.

Summary

FreeRDP from 3.17.0 before 3.32.2 contains an assertion failure in the RemoteFX differential decoder that is reachable when verbose WinPR assertions are enabled. A malicious RDP server can send a crafted RemoteFX tile with adjacent LL3 coefficients whose sum exceeds the signed 16-bit range, aborting the client process (CWE-617). Red Hat rates the issue Moderate, and Red Hat Enterprise Linux 10 has no fix available yet.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

FreeRDP from 3.17.0 before 3.32.2 contains an assertion failure in the RemoteFX differential decoder when verbose WinPR assertions are enabled. A malicious RDP server can send a crafted RemoteFX tile with adjacent LL3 coefficients summing beyond signed 16-bit range to abort the client process.

Why it matters now

EPSS 0.00254 17th percentileScored 2026-11-07
Fix Partial FreeRDP (FreeRDP): 3.32.2Red Hat: 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
FreeRDPFreeRDP3.17.0 to before 3.32.23.32.2Patch availableCNA
  • FreeRDP VendorFreeRDP Affected 3.17.0 to before 3.32.2 Fixed in 3.32.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*3.17.0 to before 3.32.2VulnerableFreeRDP
  • cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:* Versions 3.17.0 to before 3.32.2 Vulnerable ·FreeRDP

Remediation

Upgrade FreeRDP to version 3.32.2 or later. Red Hat Enterprise Linux 10 has no fix available yet.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

  • Fix · CNA FreeRDP (FreeRDP) Fixed in 3.32.2

Fixed in the same release

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

  • Release ·

    FreeRDP 3.32.2

    27 records Highest priority Priority HIGH 3 HIGH, 11 MEDIUM, 13 LOW

    Other records, highest priority first

    • TI-2026-84268 Denial of service in FreeRDP WinPR PNG and JPEG image readersPriority HIGH 77
    • TI-2026-84291 Denial of service in FreeRDP via oversized X.224 routing tokenPriority HIGH 69
    • TI-2026-84280 Use-after-free in FreeRDP dyn-channel-dump modulePriority HIGH 69
    Show all 27 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-11-03 Threatist record created from CVE-2026-121395
  2. 2026-11-03 Alias added: GHSA-6qj6-xh5j-jwj9
  3. 2026-11-03 Affected versions changed · Red Hat
  4. 2026-11-03 CVSS score added · Red Hat
  5. 2026-11-05 Priority changed: MEDIUM → LOW

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 336 →

Sources

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