What is GHSA-q56w-xxg8-3cmg?

GHSA-q56w-xxg8-3cmg is a security advisory published by GitHub Security Advisories with High severity. FreeRDP before 3.32.0 contains a double-free vulnerability in nsc_context_initialize_encode()...

Which CVE IDs does GHSA-q56w-xxg8-3cmg cover?

GHSA-q56w-xxg8-3cmg covers the following CVE IDs: CVE-2026-109257. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-q56w-xxg8-3cmg?

GHSA-q56w-xxg8-3cmg has a CVSS v3 base score of 5.9, published by GitHub Security Advisories.

GHSA-q56w-xxg8-3cmgHighCVSS 5.9

FreeRDP before 3.32.0 contains a double-free vulnerability in nsc_context_initialize_encode()...

Vendor

GitHub Security Advisories

Published

October 12, 2026

Last Modified

October 12, 2026

🔗 CVE IDs covered (1)

CVE-2026-109257 →

📋 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.

🔗 References (4)

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-2hhg-8xx6-v73w
https://nvd.nist.gov/vuln/detail/CVE-2026-109257
https://www.vulncheck.com/advisories/freerdp-before-3.32.0-double-free-via-nscodec-plane-growth-failure
https://github.com/advisories/GHSA-q56w-xxg8-3cmg