Heap-based buffer overflow in FreeRDP - CVE-2026-31883
Published: April 8, 2026
Vulnerability identifier: #VU125358
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-31883
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FreeRDP
Affected software:
FreeRDP
FreeRDP
Detailed vulnerability description
The vulnerability allows a remote attacker to overwrite heap memory.
The vulnerability exists due to a heap-based buffer overflow in the IMA-ADPCM and MS-ADPCM audio decoders in libfreerdp/codec/dsp.c when processing crafted RDPSND audio format and wave data. A remote attacker can send specially crafted RDPSND audio data to overwrite heap memory.
Audio data is processed automatically during an RDP session when RDPSND is negotiated.
How to mitigate CVE-2026-31883
Install security update from vendor's website.