CVE-2021-3682

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.

Category

8.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.49%
Vendor Advisory debian.org Vendor Advisory gentoo.org
Affected: n/a QEMU
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1989651 issue tracking third party advisory patch
https://security.netapp.com/advisory/ntap-20210902-0006/ third party advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00000.html third party advisory mailing list
https://www.debian.org/security/2021/dsa-4980 third party advisory vendor advisory
https://security.gentoo.org/glsa/202208-27 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-3682?
CVE-2021-3682 has been scored as a high severity vulnerability.
How to fix CVE-2021-3682?
To fix CVE-2021-3682, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3682 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-3682 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3682?
CVE-2021-3682 affects n/a QEMU.
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