CVE-2026-77159
Medium
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.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Microsoft Azl3 Libvirt
PublishedSep 11, 2026
First seenSep 11, 2026
Weakness typeCWE-61CWE-61
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft azl3_libvirt_11.9.0-1 | No range specified | — |
| microsoft azl3_libvirt_11.9.0-2 | No range specified | — |
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