CVE-2026-109257

Medium

Description

FreeRDP before 3.32.0 contains a double-free vulnerability in nsc_context_initialize_encode() that leaves dangling plane pointers after a partial buffer growth failure. Attackers using a crafted RDP client can negotiate NSCodec with a large desktop geometry to trigger allocation failure, crashing the server during context teardown.

SeverityMedium

CVSS5.9

Exploit probability—

ProductFreerdp

PublishedOct 12, 2026

First seenOct 12, 2026

Weakness typeCWE-415CWE-415

How to fix

Vendor advisories

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-2hhg-8xx6-v73w

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	3.31.0	—

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