What’s Vulnerable › Vulnerabilities

CVE-2020-25637

• Severity: medium (CVSS 6.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-10-06 · updated 2026-06-17
• Weakness: CWE-415

Description

A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Affected products

• openSUSE Leap: 15.1, 15.2
• libvirt: before 6.8.0 — fixed in 6.8.0

How to fix

Upgrade to a fixed version: libvirt 6.8.0. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00072.html
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00073.html
• https://bugzilla.redhat.com/show_bug.cgi?id=1881037
• https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
• https://security.gentoo.org/glsa/202210-06
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00072.html
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00073.html
• https://bugzilla.redhat.com/show_bug.cgi?id=1881037
• https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
• https://security.gentoo.org/glsa/202210-06

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