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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities
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CVE-2021-3748 Detail

Description

A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1998514 Issue Tracking  Patch  Third Party Advisory 
https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 Patch  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List  Third Party Advisory 
https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html Mailing List  Patch  Third Party Advisory 
https://security.gentoo.org/glsa/202208-27 Third Party Advisory 
https://security.netapp.com/advisory/ntap-20220425-0004/ Third Party Advisory 
https://ubuntu.com/security/CVE-2021-3748 Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free cwe source acceptance level NIST   Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Denotes Vulnerable Software
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Change History

9 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-3748
NVD Published Date:
03/23/2022
NVD Last Modified:
01/03/2023
Source:
Red Hat, Inc.