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.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qjwp-c855-hc69 Exploit, Vendor Advisory
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qjwp-c855-hc69 Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 4
- Cpes+3 CPE criteria (now 3)NVD modified 2026-10-20 20:43
- StatusUndergoing Analysis → AnalyzedNVD modified 2026-10-20 20:43
- StatusAwaiting Analysis → Undergoing AnalysisNVD modified 2026-10-18 12:17
- First seenCVSS 6.0NVD modified 2026-10-14 20:10
Affected (CPE criteria) 3
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*cpe:2.3:a:freerdp:freerdp:3.0.0:beta4:*:*:*:*:*:*cpe:2.3:a:freerdp:freerdp:3.0.0:rc0:*:*:*:*:*:*
References 3
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qjwp-c855-hc69 Exploit, Vendor Advisory
- https://www.vulncheck.com/advisories/freerdp-3.0.0-beta4-before-3.32.0-null-pointer-crash-via-arm-response Third Party Advisory
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qjwp-c855-hc69 Exploit, Vendor Advisory