What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-12 · updated 2026-10-27
• Weakness: CWE-415

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 products

• FreeRDP: 3.31.0
• FreeRDP: before 3.32.0 — fixed in 3.32.0

How to fix

Upgrade to a fixed version: FreeRDP 3.32.0. Check the vendor advisory for mitigations.

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-2hhg-8xx6-v73w
• https://www.vulncheck.com/advisories/freerdp-before-3.32.0-double-free-via-nscodec-plane-growth-failure
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-2hhg-8xx6-v73w

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