Description
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.
Metrics
CVSS 3.1 8.5/10
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | QEMU | qemu 6.1.0-rc2 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1989651Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202208-27Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210902-0006/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4980Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1989651Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202208-27Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210902-0006/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4980Third Party Advisory
Timeline
- Published
- Aug 5, 2021
- Last modified
- Jun 17, 2026
- NVD status
- Modified