CVE-2026-91947

Public on 2026-09-15

Modified on 2026-09-16

Description

FreeRDP server versions before 3.31.0 contain a use-after-free vulnerability in the DRDYNVC parser that dereferences a channel pointer after releasing the synchronization lock. Authenticated clients can race AUDIN channel closure messages against DRDYNVC data parsing to trigger heap-use-after-free when accessing freed channel objects.

Severity

Important

See what this means

CVSS v3 Base Score

7.5

See breakdown

Affected Packages

Platform	Package	Status
Amazon Linux 2 - Core	freerdp	Pending Fix
Amazon Linux 2023	freerdp	Pending Fix
Amazon Linux 2027 Preview	freerdp	Pending Fix

CVSS Scores

	Score Type	Score	Vector
Amazon Linux	CVSSv3	7.5	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-91947 Mitre: CVE-2026-91947