CVE-2026-31883

CVE Enrichment

CVSS: 9.8 CRITICAL
EPSS: 0.34%
EPSS Percentile: 27.28%
CISA KEV: Not listed

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, a size_t underflow in the IMA-ADPCM and MS-ADPCM audio decoders leads to heap-buffer-overflow write via the RDPSND audio channel. In libfreerdp/codec/dsp.c, the IMA-ADPCM and MS-ADPCM decoders subtract block header sizes from a size_t variable without checking for underflow. When nBlockAlign (received from the server) is set such that size % block_size == 0 triggers the header parsing at a point where size is smaller than the header (4 or 8 bytes), the subtraction wraps size to ~SIZE_MAX. The while (size > 0) loop then continues for an astronomical number of iterations. This vulnerability is fixed in 3.24.0.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 14-Mar-2026 02:54
Last Modified: 17-Jun-2026 17:34
EPSS Date: 2026-11-05
CWE: CWE-122, CWE-191

CVSS Vector


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

CNA Products / Version Status

FreeRDP · FreeRDP Source: CNA · [email protected]
Default status: unknown

< 3.24.0 — affected

Affected Products / Versions

freerdp / freerdp Source: NVD CPE · affected
Version / affected range: * · before (exclusive) 3.24.0
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*

References

Last enrichment sync: 06-Nov-2026 20:52
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

Top tracked enterprise CVEs include CVE-2026-32917 (OpenClaw remote command injection), CVE-2026-4747 (FreeBSD stack overflow), and CVE-2026-31883 (FreeRDP heap overflow). Cyble Weekly Report Tracks 1,960 Vulnerabilities, Including PoC Exploits and Critical ICS Flaws

CVE (8)

MITRE ATT&CK (5)

Vendors (5)

Products (10)

Industries (6)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.