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.
https://bugzilla.redhat.com/show_bug.cgi?id=1989651
https://security.netapp.com/advisory/ntap-20210902-0006/
https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html
https://www.debian.org/security/2021/dsa-4980
https://security.gentoo.org/glsa/202208-27
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
Source: MITRE
Published: 2021-08-05
Updated: 2023-03-31
Type: CWE-763
Base Score: 6
Vector: AV:N/AC:M/Au:S/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 6.8
Severity: MEDIUM
Base Score: 8.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Impact Score: 6
Exploitability Score: 1.8
Severity: HIGH