Out-of-bounds Write Affecting freerdp package, versions <2:2.11.7-1.amzn2.0.16


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.2% (9th percentile)

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  • Snyk IDSNYK-AMZN2-FREERDP-20244836
  • published29 Sept 2026
  • disclosed15 Sept 2026

Introduced: 15 Sep 2026

CVE-2026-91958  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 freerdp to version 2:2.11.7-1.amzn2.0.16 or higher.
This issue was patched in ALAS2-2026-3938.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp package and not the freerdp package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

FreeRDP versions before 3.31.0 fail to validate MonitorIds array values when parsing RDP connection files, allowing unbounded array indexing in xf_detect_monitors. Attackers can craft a malicious RDP file with an out-of-range selectedmonitors value to trigger out-of-bounds heap read and write operations when opened in xfreerdp.

CVSS Base Scores

version 3.1