CVE-2021-20257

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.

CvssV3 impact

BaseSeverity

MEDIUM

ConfidentialityImpact

NONE

AttackComplexity

LOW

Scope

CHANGED

AttackVector

LOCAL

AvailabilityImpact

HIGH

IntegrityImpact

NONE

PrivilegesRequired

LOW

BaseScore

6.5

VectorString

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Version

3.1

UserInteraction

NONE

CvssV2 impact

AccessComplexity

LOW

ConfidentialityImpact

NONE

AvailabilityImpact

PARTIAL

IntegrityImpact

NONE

BaseScore

2.1

VectorString

AV:L/AC:L/Au:N/C:N/I:N/A:P

Version

2.0

AccessVector

LOCAL

Authentication

NONE