What is CVE-2026-121391?

CVE-2026-121391 is a medium-severity vulnerability in Freerdp, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 4.3/10. Published 2026-11-03.

How severe is CVE-2026-121391?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Freerdp

CVE-2026-121391

FreeRDP from 3.0.0 before 3.32.2 contains a file descriptor leak in parallel_process_irp_create that fails to close previous descriptors on repeated IRP_MJ_CREATE requests. A hostile RDP server with parallel-device redirection enabled can send repeated CREATE requests to exhaust the client descriptor table and crash the process.

Published 2026-11-03 · last modified 2026-11-03.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.

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

Freerdp

Weakness classification (CWE)

CWE-772 — Missing Release of Resource after Effective Lifetime

References

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8g9g-hqqp-fw69 (vendor-advisory, Vendor Advisory)
www.vulncheck.com/advisories/freerdp-before-3.32.2-file-descriptor-exhaustion-v… (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-121391?: CVE-2026-121391 is a medium-severity vulnerability in Freerdp, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 4.3/10. Published 2026-11-03.
How severe is CVE-2026-121391?: Medium severity. CVSS v3 base score is 4.3 out of 10.