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Vulnerabilities CVE-2026-63622

CVE-2026-63622

High
Open
TLP:CLEAR

Libvirt: swtpm privilege escalation via symlink following

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Description

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.

Details

CVSS Score
7.8
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Confidence
90%
Published
Aug 10, 2026
Last Modified
Aug 10, 2026
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