Vulnerability · Published Sep 15, 2026 · Assigned by VulnCheck

CVE-2026-91952FreeRDP before 3.31.0 Denial of Service via pool_decode_rect

Medium 6.5

In plain English

A medium-severity infinite loop in FreeRDP from FreeRDP. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 66.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

FreeRDP versions before 3.31.0 contain an infinite-loop denial of service in the pool_decode_rect function when decoding AVC444 metablocks with more region rectangles than preallocated worker array size. A malicious RDP server can send crafted AVC444 graphics updates causing the threaded decode path to loop indefinitely, consuming CPU and preventing normal client operation.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:13	freerdp3	no fix listed	DEBIAN-CVE-2026-91952
Debian:14	freerdp3	3.31.0+dfsg-1	DEBIAN-CVE-2026-91952
Ubuntu:22.04:LTS	freerdp2	no fix listed	UBUNTU-CVE-2026-91952
Ubuntu:24.04:LTS	freerdp3	3.31.0+dfsg-0ubuntu0.24.04.1	UBUNTU-CVE-2026-91952
Ubuntu:26.04:LTS	freerdp3	3.31.0+dfsg-0ubuntu0.26.04.1	UBUNTU-CVE-2026-91952

Affected products (as reported)

Vendor	Product	Versions
FreeRDP	FreeRDP	0 – before 3.31.0

Weakness: CWE-835 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-m85m-3qxv-63h5) vendor-advisory
VulnCheck Advisory: FreeRDP before 3.31.0 Denial of Service via pool_decode_rect third-party-advisory