CVEvulnerability

CVE-2021-3682

8.5 HIGH Published 2021-08-05 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-08-05
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.5 HIGH — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.0 MEDIUM — AV:N/AC:M/Au:S/C:P/I:P/A:P
Weaknesses
CWE-763

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.

Affected configurations

• qemu qemu (< 6.1.0) • qemu qemu 6.1.0 • redhat enterprise linux 8.0 • debian debian linux 9.0 • debian debian linux 10.0 • debian debian linux 11.0

Related

Weakness · CWE (1)

  • CWE-763 Release of Invalid Pointer or Reference weakness

References