MEDIUM 5.5 NVD
CVE-2026-77159
A symlink-following flaw was found in libvirt's qemuTPMEmulatorPrepareHost() function. The function uses a path-based chown() on the swtpm logfile without check
A symlink-following flaw was found in libvirt's qemuTPMEmulatorPrepareHost() function. The function uses a path-based chown() on the swtpm logfile without checking for symbolic links. A local attacker with access to the swtpm account can replace the logfile with a symlink, causing libvirtd (running as root) to transfer ownership of an arbitrary file to the swtpm user.
References
- https://access.redhat.com/security/cve/CVE-2026-77159
- https://bugzilla.redhat.com/show_bug.cgi?id=2531811
- https://gitlab.com/libvirt/libvirt/-/work_items/909
This medium severity vulnerability with a CVSS score of 5.5 was published on 2026-09-11 via NVD.
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