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Vulnerabilities

Vulnerability · CVE-2026-111373

FreeRDP before 3.32.0 NULL Dereference via Zero-Length WebSocket Ping

Published Oct 16, 2026 · catalog updated Oct 16, 2026 · Red Hat Red Hat Enterprise Linux

Check if you run it

No confirmed exploitation is on record for CVE-2026-111373. EPSS is 0.25%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.25%
Remediation
Advisory link
Affected products
vendor FreeRDP FreeRDP

FreeRDP before 3.32.0 contains a NULL pointer dereference vulnerability in the websocket transport that allows a malicious gateway to crash clients by sending zero-length pings. When the payload length is zero, websocket_reply_pong passes a nullptr stream to websocket_reply_close, triggering an assertion failure that terminates the client process and causes denial of service.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor FreeRDP FreeRDPversion unspecified

How to fix CVE-2026-111373

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-111373. EPSS is 0.25%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-476: NULL Pointer Dereference; CWE-617. EPSS 0.25%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 16, 2026 · CIRCL Vulnerability Lookup

    Detected

    FreeRDP before 3.32.0 contains a NULL pointer dereference vulnerability in the websocket transport that allows a malicious gateway to crash clients by sending zero-length pings. When the payload length is zero, websocket_reply_pong passes a nullptr stream to websocket_reply_close, triggering an assertion failure that terminates the client process and causes denial of service.

  2. Oct 16, 2026 · NIST NVD

    Updated

    FreeRDP before 3.32.0 contains a NULL pointer dereference vulnerability in the websocket transport that allows a malicious gateway to crash clients by sending zero-length pings. When the payload length is zero, websocket_reply_pong passes a nullptr stream to websocket_reply_close, triggering an assertion failure that terminates the client process and causes denial of service.

Sources

  • CIRCL Vulnerability LookupVulnerability recordCVE-2026-111373

    FreeRDP before 3.32.0 contains a NULL pointer dereference vulnerability in the websocket transport that allows a malicious gateway to crash clients by sending zero-length pings. When the payload length is zero, websocket_reply_pong passes a nullptr stream to websocket_reply_close

    vulnerability.circl.lu
  • CVE.orgVulnerability recordCVE-2026-111373

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-111373

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-111373

    FreeRDP before 3.32.0 contains a NULL pointer dereference vulnerability in the websocket transport that allows a malicious gateway to crash clients by sending zero-length pings. When the payload length is zero, websocket_reply_pong passes a nullptr stream to websocket_reply_close

    nvd.nist.gov
  • Red Hat Security DataVendor advisoryCVE-2026-111373

    freerdp: FreeRDP: Denial of Service via zero-length WebSocket ping

    access.redhat.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.