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CVE-2026-63623

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

Published: Aug 10, 2026Updated: Aug 14, 2026 Sources: CVE List NVDCWE-732
5.5MEDIUM
NVD MITRE
EPSS Score
0.1%
Top 99.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-732

Affected Products

Red Hat
commercial·US
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux for NVIDIA 26On-premOS
Operating Systems / linux-distro
and 4 more affected products View all →

Exploitability

Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://access.redhat.com/security/cve/CVE-2026-63623
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2513066
bugzilla.redhat.com

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