CVE-2026-22852 — CRITICAL (9.8)

Q: How severe is CVE-2026-22852?

CVE-2026-22852 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Q: Is there a patch for CVE-2026-22852?

Check the references section above for vendor advisories and patch information. Affected products include: Freerdp Freerdp.

Vulnerability Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a malicious RDP server can trigger a heap-buffer-overflow write in the FreeRDP client when processing Audio Input (AUDIN) format lists. audin_process_formats reuses callback->formats_count across multiple MSG_SNDIN_FORMATS PDUs and writes past the newly allocated formats array, causing memory corruption and a crash. This vulnerability is fixed in 3.20.1.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Freerdp	Freerdp	< 3.20.1

Related Weaknesses (CWE)

CWE-787

References

https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1Release Notes
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9chc-g79v-4qq4ExploitVendor Advisory

FAQ

What is CVE-2026-22852?

CVE-2026-22852 is a vulnerability with a CVSS score of 9.8 (CRITICAL). FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a malicious RDP server can trigger a heap-buffer-overflow write in the FreeRDP client when processing Audio Input (AUD...

How severe is CVE-2026-22852?

CVE-2026-22852 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-22852?

Check the references section above for vendor advisories and patch information. Affected products include: Freerdp Freerdp.