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CVE-2026-63622
Published:August 10, 2026
Updated:September 01, 2026
A flaw was found in libvirt. A local attacker, specifically a process running as the confined "swtpm" user, could exploit a symlink-following vulnerability in the "virFileChownFiles()" function. By planting a symbolic link within the "swtpm" state directory, the attacker could trick the root-level libvirt daemon into changing the ownership of an arbitrary file to the "swtpm" user. This allows for privilege escalation from the "swtpm" sandbox to root-level file ownership control.
Affected Packages
https://github.com/libvirt/libvirt.git (GITHUB):
Affected version(s) >=v0.0.1 <v12.6.0
Fix Suggestion:
Update to version v12.6.0
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CVSS v4
Base Score:
8.5
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.8
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Link Resolution Before File Access ('Link Following')
EPSS
Base Score:
0.13