CVE-2026-109679: FreeRDP 3.0.0-beta4 before 3.32.0 NULL Pointer Crash via ARM Response

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-10-13 · updated 2026-10-20
Weakness: CWE-476

Description

FreeRDP 3.0.0-beta4 before 3.32.0 contains a NULL pointer dereference in arm_handle_request_ok when an ARM endpoint returns an empty HTTP 200 body. Attackers controlling the configured ARM gateway can return a zero-length body to pass NULL to strnlen and crash the connecting client.

Affected products

FreeRDP: from 3.0.0 (excl.) before 3.32.0; 3.0.0-beta4, 3.0.0-rc0 — 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-qjwp-c855-hc69
https://www.vulncheck.com/advisories/freerdp-3.0.0-beta4-before-3.32.0-null-pointer-crash-via-arm-response
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qjwp-c855-hc69

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