CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 5.5. It may lead to a denial-of-service condition.
CVE
CVE-2021-3527
Severity
MEDIUM
CVSS
5.5
EPSS
0.37%
Original NVD Description
A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service.
Related CVEs
Other vulnerabilities affecting the same vendor(s)