What is CVE-2026-22857?

CVE-2026-22857 is a critical-severity vulnerability in Freerdp, classified under Use After Free. CVSS score: 9.8/10. Published 2026-01-14.

How severe is CVE-2026-22857?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Use After Free in Freerdp

CVE-2026-22857

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a heap use-after-free occurs in irp_thread_func because the IRP is freed by irp->Complete() and then accessed again on the error path. This vulnerability is…

Vulnerability class: Use-After-Free

EPSS: 0.005 (36.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Freerdp — versions < 3.20.1

Weakness classification (CWE)

CWE-416 — Use After Free

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-22857?: CVE-2026-22857 is a critical-severity vulnerability in Freerdp, classified under Use After Free. CVSS score: 9.8/10. Published 2026-01-14.
How severe is CVE-2026-22857?: Critical severity. CVSS v3 base score is 9.8 out of 10.