VULNERABILITY INTELLIGENCE

CVE-2021-20257

CVSS score6.5 MEDIUM
EPSS probability0.37%
CISA KEVNot currently listed
Published2022-03-16
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

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.

Weakness classification

  • secalert@redhat.com: CWE-835
  • nvd@nist.gov: CWE-835

Primary references