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.
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References
History
No history.
MITRE
Status: PUBLISHED
Assigner: redhat
Published: 2021-05-26T21:13:56
Updated: 2024-08-03T17:01:07.589Z
Reserved: 2021-04-30T00:00:00
Link: CVE-2021-3527
Vulnrichment
No data.
NVD
Status : Analyzed
Published: 2021-05-26T22:15:08.267
Modified: 2022-09-30T15:10:31.600
Link: CVE-2021-3527
Redhat