Security Advisory

CVE-2026-77159

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-09-11 10:32:29

Last updated 2026-09-15 15:40:56

Assigner redhat

CVSS score 5.5

State PUBLISHED

Description

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.

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