U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-20257 Detail

Description

An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.


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

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1930087 Issue Tracking  Patch  Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=1930087 Issue Tracking  Patch  Third Party Advisory 
https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 Patch  Third Party Advisory 
https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 Patch  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List  Third Party Advisory 
https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html Mailing List  Patch  Vendor Advisory 
https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html Mailing List  Patch  Vendor Advisory 
https://security.gentoo.org/glsa/202208-27 Third Party Advisory 
https://security.gentoo.org/glsa/202208-27 Third Party Advisory 
https://security.netapp.com/advisory/ntap-20220425-0003/ Third Party Advisory 
https://security.netapp.com/advisory/ntap-20220425-0003/ Third Party Advisory 
https://www.openwall.com/lists/oss-security/2021/02/25/2 Mailing List  Patch  Third Party Advisory 
https://www.openwall.com/lists/oss-security/2021/02/25/2 Mailing List  Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop') cwe source acceptance level NIST   Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

10 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-20257
NVD Published Date:
03/16/2022
NVD Last Modified:
11/21/2024
Source:
Red Hat, Inc.