NULL pointer dereference in Freerdp
CVE-2026-121402
FreeRDP before 3.32.2 contains a NULL pointer dereference vulnerability that allows malicious RDP servers to crash xfreerdp clients by sending a zero-width RDPGFX ResetGraphics PDU. The failed resize in gdi_resize_ex leaves the primary display null without ending the session, so a later bitmap update crashes the client in gdi_Bitmap_Paint.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-c426-ppvf-jpfg (vendor-advisory, Vendor Advisory)
- www.vulncheck.com/advisories/freerdp-before-3.32.2-x11-client-crash-via-zero-wi… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-121402?
- CVE-2026-121402 is a medium-severity vulnerability in Freerdp, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-11-03.
- How severe is CVE-2026-121402?
- Medium severity. CVSS v3 base score is 6.5 out of 10.