Vulnerabilities > CVE-2021-3682 - Release of Invalid Pointer or Reference vulnerability in multiple products

047910
CVSS 8.5 - HIGH
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
high complexity
qemu
redhat
debian
CWE-763

Summary

A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host.

Vulnerable Configurations

Part Description Count
Application
Qemu
351
OS
Redhat
2
OS
Debian
3

Common Weakness Enumeration (CWE)