CVE-2026-91950

Medium

Description

FreeRDP before 3.31.0 contains an out-of-bounds read vulnerability in the rdpdr_dump_packet function due to 32-bit unsigned integer wraparound in buffer bounds validation. A malicious RDP server can send a crafted RDPDR packet with computerNameLen set to 0xFFFFFFF0 to bypass bounds checks and trigger memory reads past the packet buffer, causing client crashes or heap disclosure in logs.

SeverityMedium

CVSS6.5

Exploit probability—

ProductFreerdp

PublishedSep 15, 2026

First seenSep 15, 2026

Weakness typeCWE-125Out-of-bounds read

How to fix

Update

freerdp freerdp3.31.0 or later

Vendor advisories

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-c5gr-hmqp-pwj4

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	v < 3.31.0	3.31.0

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