Vulnerability · Published Mar 25, 2022 · Assigned by redhat
CVE-2021-4147
Medium 6.5
In plain English
A medium-severity security flaw in libvirt. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)0.2%top 84.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A flaw was found in the libvirt libxl driver. A malicious guest could continuously reboot itself and cause libvirtd on the host to deadlock or crash, resulting in a denial of service condition.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libvirt | 7.10.0-2 | DEBIAN-CVE-2021-4147 |
| Debian:13 | libvirt | 7.10.0-2 | DEBIAN-CVE-2021-4147 |
| Debian:14 | libvirt | 7.10.0-2 | DEBIAN-CVE-2021-4147 |
| Ubuntu:22.04:LTS | libvirt | 8.0.0-1ubuntu7.19 | USN-8652-1 |
| Ubuntu:24.04:LTS | libvirt | 10.0.0-2ubuntu8.16 | USN-8652-1 |
| Ubuntu:26.04:LTS | libvirt | 12.0.0-1ubuntu5.3 | USN-8652-1 |
Affected products (as reported)
Weakness: CWE-667