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TI-2020-15655 Aliases CVE-2020-25637GHSA-2qf3-2mv6-pggh

Double free in libvirt

Priority LOW 30CWE-415Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 11 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-415 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.00529 44th percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 11 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—libvirtlibvirt versions before 6.8.0—No fix listedCNA
  • libvirt Vendor— Affected libvirt versions before 6.8.0 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:redhat:libvirt:*:*:*:*:*:*:*:*before 6.8.0VulnerableRed Hat
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*15.2VulnerableopenSUSE
  • cpe:2.3:a:redhat:libvirt:*:*:*:*:*:*:*:* Versions before 6.8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* Versions 15.2 Vulnerable ·openSUSE

Remediation

Red Hat 3 advisories

  • RHSA-2021:1762 Released 2021-05-18 · Red Hat rating Moderate
    virt:rhel and virt-devel:rhel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) SLOF-20191022-3.git899d9883.module+el8.3.0+6423+e4cb6418.src::virt-devel:rhel, hivex-1.3.18-20.module+el8.3.0+6423+e4cb6418.i686::virt-devel:rhel, hivex-devel-1.3.18-20.module+el8.3.0+6423+e4cb6418.i686::virt-devel:rhel +47
    • Red Hat Enterprise Linux AppStream (v. 8) SLOF-20191022-3.git899d9883.module+el8.3.0+6423+e4cb6418.noarch::virt:rhel, SLOF-20191022-3.git899d9883.module+el8.3.0+6423+e4cb6418.src::virt:rhel, hivex-1.3.18-20.module+el8.3.0+6423+e4cb6418.aarch64::virt:rhel +47
  • RHSA-2020:5111 Released 2020-11-18 · Red Hat rating Moderate
    virt:8.2 and virt-devel:8.2 security and bug fix update
    • Advanced Virtualization CodeReady Builder for RHEL 8.2.1 SLOF-20191022-3.git899d9883.module+el8.2.0+5449+efc036dd.src::virt-devel:8.2, hivex-1.3.18-20.module+el8.2.0+5588+63a201c3.i686::virt-devel:8.2, hivex-devel-1.3.18-20.module+el8.2.0+5588+63a201c3.i686::virt-devel:8.2 +47
    • Advanced Virtualization for RHEL 8.2.1 SLOF-20191022-3.git899d9883.module+el8.2.0+5449+efc036dd.noarch::virt:8.2, SLOF-20191022-3.git899d9883.module+el8.2.0+5449+efc036dd.src::virt:8.2, hivex-1.3.18-20.module+el8.2.0+5588+63a201c3.aarch64::virt:8.2 +47
  • RHSA-2020:5040 Released 2020-11-10 · Red Hat rating Moderate
    libvirt security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) libvirt-4.5.0-36.el7_9.3, libvirt-bash-completion-4.5.0-36.el7_9.3, libvirt-client-4.5.0-36.el7_9.3 +21
    • Red Hat Enterprise Linux Client Optional (v. 7) libvirt-admin-4.5.0-36.el7_9.3, libvirt-daemon-lxc-4.5.0-36.el7_9.3, libvirt-devel-4.5.0-36.el7_9.3 +4
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libvirt-4.5.0-36.el7_9.3, libvirt-admin-4.5.0-36.el7_9.3, libvirt-daemon-4.5.0-36.el7_9.3 +25
    • Red Hat Enterprise Linux Server (v. 7) libvirt-4.5.0-36.el7_9.3, libvirt-bash-completion-4.5.0-36.el7_9.3, libvirt-client-4.5.0-36.el7_9.3 +26
    • Red Hat Enterprise Linux Server Optional (v. 7) libvirt-admin-4.5.0-36.el7_9.3, libvirt-daemon-lxc-4.5.0-36.el7_9.3, libvirt-lock-sanlock-4.5.0-36.el7_9.3 +3
    • Red Hat Enterprise Linux Workstation (v. 7) libvirt-4.5.0-36.el7_9.3, libvirt-bash-completion-4.5.0-36.el7_9.3, libvirt-client-4.5.0-36.el7_9.3 +22
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libvirt-admin-4.5.0-36.el7_9.3, libvirt-daemon-lxc-4.5.0-36.el7_9.3, libvirt-docs-4.5.0-36.el7_9.3 +3

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 8 Advanced VirtualizationAffectedNo fix yet
Advanced Virtualization CodeReady Builder for RHEL 8.2.1Fixed RHSA-2020:5111
Advanced Virtualization for RHEL 8.2.1Fixed RHSA-2020:5111
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2021:1762
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:1762
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2020:5040
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:5040
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2020:5040
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:5040
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:5040
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:5040
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:5040
Not affected: 3 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-25637
  2. 2026-10-03 Alias added: GHSA-2qf3-2mv6-pggh

References

Patch 1

Advisory 3

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences