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.
References10
- access.redhat.com/errata/RHSA-2026:64773
- access.redhat.com/errata/RHSA-2026:65515
- access.redhat.com/errata/RHSA-2026:65516
- access.redhat.com/errata/RHSA-2026:65803
- access.redhat.com/errata/RHSA-2026:68513
- access.redhat.com/errata/RHSA-2026:68594
- access.redhat.com/errata/RHSA-2026:69114
- access.redhat.com/errata/RHSA-2026:69131
- access.redhat.com/errata/RHSA-2026:74424
- access.redhat.com/errata/RHSA-2026:75583
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 4 · as of 12 November 2026
- CWE
- CWE-59
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.