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TI-2026-74520 Aliases CVE-2026-110830

FreeRDP serial device handling exhausts file descriptors

Priority HIGH 69CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 2 fixed, 3 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-400.

Summary

FreeRDP from 2.0.0-rc0 before 3.32.0 fails to close earlier serial handles in serial_process_irp_create, which is CWE-400. A malicious RDP server can send repeated serial IRP_MJ_CREATE requests to exhaust file descriptors and terminate the client. The attack has high complexity and needs no privileges or user interaction. A public exploit is linked in the references.

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

Description from the CNA

FreeRDP before 3.32.0 fails to close prior serial handles in serial_process_irp_create, allowing a malicious RDP server to exhaust file descriptors. Attackers can send repeated serial IRP_MJ_CREATE requests to accumulate descriptors and terminate the client at the CommReadFile FD_SETSIZE assertion.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00319 25th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial FreeRDP (FreeRDP): 3.32.0Red Hat: 1 advisoryRed Hat: 2 fixed, 3 without a fix

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
FreeRDPFreeRDP2.0.0-rc0 to before 3.32.03.32.0Patch availableCNA
  • FreeRDP VendorFreeRDP Affected 2.0.0-rc0 to before 3.32.0 Fixed in 3.32.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*2.0.0 to before 3.32.0VulnerableFreeRDP
  • cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:* Versions 2.0.0 to before 3.32.0 Vulnerable ·FreeRDP

Remediation

Upgrade FreeRDP to 3.32.0 or later. Red Hat advisory RHSA-2026:94514 fixes Red Hat Enterprise Linux AppStream and CodeReady Linux Builder, both version 10. The sources list no fixed version for Red Hat Enterprise Linux 7, 8 or 9.

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

  • Fix · CNA FreeRDP (FreeRDP) Fixed in 3.32.0

Red Hat 1 advisory

  • RHSA-2026:94514 Released 2026-11-03 · Red Hat rating Important
    freerdp security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) freerdp-2:3.32.2-1.el10_2, freerdp-libs-2:3.32.2-1.el10_2, libwinpr-2:3.32.2-1.el10_2
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) freerdp-devel-2:3.32.2-1.el10_2, freerdp-server-2:3.32.2-1.el10_2, libwinpr-devel-2:3.32.2-1.el10_2

Fixed in the same release

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

  • Release ·

    FreeRDP 3.32.0

    11 records Highest priority Priority HIGH 1 HIGH, 9 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-74529 Heap out-of-bounds write in FreeRDP JPEG clipboard conversionPriority MEDIUM 64
    • TI-2026-74526 FreeRDP Infinite Loop DoS via Gateway Content-TypePriority MEDIUM 64
    • TI-2026-74524 FreeRDP null pointer dereference lets malicious servers crash clientsPriority MEDIUM 64
    Show all 11 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:94514
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:94514
Not affected: 1 product
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-110830
  2. 2026-10-15 CISA SSVC decision points changed
  3. 2026-10-15 Priority changed: MEDIUM → HIGH
  4. 2026-10-16 Affected versions changed · Red Hat
  5. 2026-10-16 CVSS score added · Red Hat
  6. 2026-10-23 CVSS score added · NVD
  7. 2026-10-30 Affected versions changed · Red Hat
  8. 2026-11-03 Fix available: RHSA-2026:94514 · Red Hat
  9. 2026-11-03 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · Red Hat

References

Exploit 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