UBUNTU-CVE-2021-4158

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2021-4158
Downstream
USN-5307-1
Published: 24 Dec 2021, 00:00
Last modified:04 Feb 2026, 04:23

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
6 MEDIUM
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

24 Dec 2021, 00:00
Published
Vulnerability first disclosed
04 Feb 2026, 04:23
Last Modified
Vulnerability information updated

Description

A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

Affected Systems

  • ubuntu•qemu

    < 1:6.2+dfsg-2ubuntu5

References (5)