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TI-2019-02852 Aliases CVE-2019-3840GHSA-rx4m-pcxc-jchp

NULL pointer dereference in libvirt

Priority LOW 31CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

A NULL pointer dereference flaw was discovered in libvirt before version 5.0.0 in the way it gets interface information through the QEMU agent. An attacker in a guest VM can use this flaw to crash libvirtd and cause a denial of service.

Why it matters now

EPSS 0.01482 74th percentileScored 2026-11-07
Public exploit Yes 3 exploit referencesTagged by NVD
Fix Fixed Red Hat: 1 advisory

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
The libvirt Projectlibvirt5.0.0—No fix listedCNA
  • libvirt VendorThe libvirt Project Affected 5.0.0 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:redhat:libvirt:*:*:*:*:*:*:*:*before 5.0.0VulnerableRed Hat
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*15.0VulnerableopenSUSE
cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*42.3VulnerableopenSUSE
  • cpe:2.3:a:redhat:libvirt:*:*:*:*:*:*:*:* Versions before 5.0.0 Vulnerable ·Red Hat
  • cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:* Versions 42.3 Vulnerable ·openSUSE

Remediation

Red Hat 1 advisory

  • RHSA-2019:2294 Released 2019-08-06 · Red Hat rating Moderate
    libvirt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) libvirt-4.5.0-23.el7, libvirt-bash-completion-4.5.0-23.el7, libvirt-client-4.5.0-23.el7 +21
    • Red Hat Enterprise Linux Client Optional (v. 7) libvirt-admin-4.5.0-23.el7, libvirt-daemon-lxc-4.5.0-23.el7, libvirt-devel-4.5.0-23.el7 +4
    • Red Hat Enterprise Linux ComputeNode (v. 7) libvirt-4.5.0-23.el7, libvirt-bash-completion-4.5.0-23.el7, libvirt-client-4.5.0-23.el7 +1
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libvirt-4.5.0-23.el7, libvirt-admin-4.5.0-23.el7, libvirt-daemon-4.5.0-23.el7 +25
    • Red Hat Enterprise Linux Server (v. 7) libvirt-4.5.0-23.el7, libvirt-bash-completion-4.5.0-23.el7, libvirt-client-4.5.0-23.el7 +26
    • Red Hat Enterprise Linux Server Optional (v. 7) libvirt-admin-4.5.0-23.el7, libvirt-daemon-lxc-4.5.0-23.el7, libvirt-lock-sanlock-4.5.0-23.el7 +3
    • Red Hat Enterprise Linux Workstation (v. 7) libvirt-4.5.0-23.el7, libvirt-bash-completion-4.5.0-23.el7, libvirt-client-4.5.0-23.el7 +23
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libvirt-admin-4.5.0-23.el7, libvirt-daemon-lxc-4.5.0-23.el7, libvirt-lock-sanlock-4.5.0-23.el7 +2

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2019:2294
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2019:2294
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2019:2294
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2019:2294
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:2294
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2019:2294
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:2294
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2019:2294
Not affected: 4 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8
  • Red Hat Storage 3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-3840
  2. 2026-10-03 Alias added: GHSA-rx4m-pcxc-jchp

References

Exploit 3

Advisory 4

Sources

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