Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

CVE-2026-109257FreeRDP before 3.32.0 Double Free via NSCodec plane growth failure

Medium 5.9

In plain English

A medium-severity double free in FreeRDP from FreeRDP. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)0.4%top 66.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	freerdp2	no fix listed	DEBIAN-CVE-2026-109257
Debian:13	freerdp3	no fix listed	DEBIAN-CVE-2026-109257
Debian:14	freerdp3	3.32.0+dfsg-1	DEBIAN-CVE-2026-109257
Ubuntu:22.04:LTS	freerdp2	no fix listed	UBUNTU-CVE-2026-109257
Ubuntu:24.04:LTS	freerdp3	3.32.0+dfsg-0ubuntu0.24.04.1	UBUNTU-CVE-2026-109257
Ubuntu:26.04:LTS	freerdp3	3.32.0+dfsg-0ubuntu0.26.04.1	UBUNTU-CVE-2026-109257

Affected products (as reported)

Vendor	Product	Versions
FreeRDP	FreeRDP	0 – before 3.32.0

Weakness: CWE-415 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-2hhg-8xx6-v73w) vendor-advisory
VulnCheck Advisory: FreeRDP before 3.32.0 Double Free via NSCodec plane growth failure third-party-advisory