CVE-2020-12430

An issue was discovered in qemuDomainGetStatsIOThread in qemu/qemu_driver.c in libvirt 4.10.0 though 6.x before 6.1.0. A memory leak was found in the virDomainListGetStats libvirt API that is responsible for retrieving domain statistics when managing QEMU guests. This flaw allows unprivileged users with a read-only connection to cause a memory leak in the domstats command, resulting in a potential denial of service.

Published: 2020-04-28 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-12430 is rated Moderate Risk (55.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.29%). EPSS rose +1.58% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-12430

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.72% 2.29% +1.58%
2 2026-05-01 0.95% 0.72% -0.23%
3 2025-12-25 — 0.95% —

Full EPSS history (22 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-12430

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2020-12430

OS Trackers for CVE-2020-12430

vendor priority summary link
alpine — CVE-2020-12430: 1 source package rows (libvirt); 6 state rows across 4 repos (3.10-main, 3.11-main, 3.22-community, edge-community); fixed 4, open 2. https://security.alpinelinux.org/vuln/CVE-2020-12430
debian low CVE-2020-12430 low priority: Debian including 1 source packages (libvirt), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-12430
redhat medium — https://access.redhat.com/security/cve/CVE-2020-12430
suse medium — https://www.suse.com/security/cve/CVE-2020-12430/
ubuntu medium CVE-2020-12430 medium priority: Ubuntu including 1 source packages (libvirt), 6 status rows across 6 suites (bionic, eoan, focal, trusty, upstream, xenial): not-affected 3, released 2, needs-triage 1. https://ubuntu.com/security/CVE-2020-12430

Affected software / configurations for CVE-2020-12430

Vendor Product Version Raw CPE
redhat libvirt >= 4.10.0, < 6.1.0 cpe:2.3:a:redhat:libvirt:*:*:*:*:*:*:*:*
redhat enterprise_linux 8.0 cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*

References for CVE-2020-12430

cvelogic Threat Intelligence