FreeRDP up to 3.20.0 audin_process_formats out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in FreeRDP up to 3.20.0 and classified as critical. This impacts the function audin_process_formats. The manipulation leads to out-of-bounds write. This vulnerability is documented as CVE-2026-22852. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in FreeRDP up to 3.20.0 and classified as critical. This issue affects the function audin_process_formats. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-22852 since 01/12/2026. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 297418 (SUSE SLED15 / SLES15 Security Update : freerdp (SUSE-SU-2026:0345-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.20.1 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the databases at Tenable (297418), EUVD (EUVD-2026-2676) and CERT Bund (WID-SEC-2026-0111). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source FreeRDP

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.6
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Proof-of-Concept

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 297418
Nessus Name: SUSE SLED15 / SLES15 Security Update : freerdp (SUSE-SU-2026:0345-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FreeRDP 3.20.1

Timelineinfo

01/12/2026 CVE reserved
01/14/2026 +2 days Advisory disclosed
01/14/2026 +0 days VulDB entry created
02/26/2026 +43 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-9chc-g79v-4qq4
Status: Confirmed

CVE: CVE-2026-22852 (🔒)
GCVE (CVE): GCVE-0-2026-22852
GCVE (VulDB): GCVE-100-341141
EUVD: 🔒
CERT Bund: WID-SEC-2026-0111 - FreeRDP: Mehrere Schwachstellen

Entryinfo

Created: 01/14/2026 21:31
Updated: 02/26/2026 10:05
Changes: 01/14/2026 21:31 (70), 01/15/2026 20:41 (1), 01/17/2026 08:33 (2), 01/21/2026 05:48 (11), 01/31/2026 15:07 (2), 02/26/2026 10:05 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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