CVE-2026-63623

MEDIUM

Libvirt: information disclosure via world-readable storage volume images during clone/convert

Title source: CVE List
STIX 2.1 vulnerability

Record summary

CVE-2026-63623 has a selected CVSS score of 5.5 (medium).

Description

A flaw was found in libvirt. During storage volume clone or convert operations, newly created volume images were temporarily world-readable. This was caused by the `qemu-img` utility running with overly permissive file creation settings, allowing any local user to read the full guest disk contents. This vulnerability could lead to sensitive information disclosure from guest virtual machines.

Description source: CVE List

Exploitation context

CISA SSVC decision

ExploitationNone
AutomatableNo
Technical impactPartial

CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 10, 2026 · Source: CVE List

Affected products and versions

6
ProductSourceVersion range

Red Hat Enterprise Linux 10

Browse Red Hat / Red Hat Enterprise Linux 10libvirt

Default status: affected

CVE ListVersion data not supplied

Red Hat Enterprise Linux 6

Browse Red Hat / Red Hat Enterprise Linux 6libvirt

Default status: affected

CVE ListVersion data not supplied

Red Hat Enterprise Linux 7

Browse Red Hat / Red Hat Enterprise Linux 7libvirt

Default status: affected

CVE ListVersion data not supplied

Red Hat Enterprise Linux 8

Browse Red Hat / Red Hat Enterprise Linux 8virt:rhel/libvirt

Default status: affected

CVE ListVersion data not supplied

Red Hat Enterprise Linux 9

Browse Red Hat / Red Hat Enterprise Linux 9libvirt

Default status: affected

CVE ListVersion data not supplied

Red Hat Enterprise Linux for NVIDIA 26

Browse Red Hat / Red Hat Enterprise Linux for NVIDIA 26libvirt

Default status: unknown

CVE ListVersion data not supplied

References

3