CVE-2026-91956

MediumCVSS 6.5/10Last modified Sep 24, 2026

Description

FreeRDP before 3.31.0 contains an out-of-bounds read vulnerability in the URBDRC channel's func_get_ep_desc function that indexes interface arrays by position instead of protocol field InterfaceNumber. A malicious RDP server can send a crafted SELECT_CONFIGURATION message with permuted InterfaceNumber values to read past allocated heap memory and crash the client.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-125

Affected software

Vendor	Product	Versions
FreeRDP	FreeRDP	< 3.31.0

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hg4r-vv53-vwf8Exploit, Mitigation, Vendor Advisory
https://www.vulncheck.com/advisories/freerdp-before-3.31.0-out-of-bounds-read-via-urbdrcThird Party Advisory

Timeline

Published: Sep 15, 2026
Last modified: Sep 24, 2026
NVD status: Analyzed

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