CVE-2021-3544

MEDIUM

QEMU <= 6.0.0 - Memory Leak in vhost-user-gpu Device

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-3544. PoCs published by Goultarde.

AI-analyzed exploit summary This repository contains a functional exploit for CVE-2021-35448, targeting Remote Mouse (formerly WiFi Mouse) to achieve remote code execution. The exploit sends crafted packets to open a command prompt and execute arbitrary commands, including reverse shell payloads via PowerShell.

Description

Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user-gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime.

Exploits (1)

nomisec WORKING POC
by Goultarde · poc
https://github.com/Goultarde/CVE-2021-3544_RemoteMouse-3.008-RCE

This repository contains a functional exploit for CVE-2021-35448, targeting Remote Mouse (formerly WiFi Mouse) to achieve remote code execution. The exploit sends crafted packets to open a command prompt and execute arbitrary commands, including reverse shell payloads via PowerShell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Remote Mouse (WiFi Mouse) 3.008
No auth needed
Prerequisites: Target must have Remote Mouse installed and running · Network access to the target on port 1978
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (5)

Core 5
Core References
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2021/05/31/1
Issue Tracking x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1958935
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210720-0008/
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2021/dsa-4980
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/202208-27

Scores

CVSS v3 6.5
EPSS 0.0044
EPSS Percentile 34.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Details

CWE
CWE-401
Status published
Products (2)
debian/debian_linux 11.0
qemu/qemu < 6.0.0
Published Jun 02, 2021
Tracked Since Feb 18, 2026