CVE-2026-121409

Public on 2026-11-03

Modified on 2026-11-10

Description

FreeRDP before 3.32.2 contains a denial of service vulnerability that allows malicious servers or unauthenticated peers to abort clients or proxies via oversized X.224 routing tokens. Attackers can send an oversized LoadBalanceInfo in a Server Redirection PDU, or a 240–247 byte token to a FixedTarget freerdp-proxy, triggering a tpdu_write_header assertion that crashes the process.

Severity

Medium

See what this means

CVSS v3 Base Score

5.9

See breakdown

Affected Packages

Platform	Package	Status
Amazon Linux 2 - Core	freerdp	Not Affected
Amazon Linux 2023	freerdp	Pending Fix
Amazon Linux 2027 Preview	freerdp	Pending Fix

CVSS Scores

	Score Type	Score	Vector
Amazon Linux	CVSSv3	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-121409 Mitre: CVE-2026-121409