#VU59085 Infinite loop in QEMU - CVE-2021-20257

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Main Vulnerability Database Vulnerabilities #VU59085

#VU59085 Infinite loop in QEMU - CVE-2021-20257

Published: December 22, 2021


Vulnerability identifier: #VU59085
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-20257
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
QEMU
Software vendor:
QEMU

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in the e1000 NIC emulator when processing transmits (tx) descriptors in process_tx_desc of QEMU. A remote user can consume all available CPU resources and cause denial of service conditions.


Remediation

Install updates from vendor's website.

External links