MEDIUMVulnerability
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 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.
Properties
- severity
- MEDIUM
- score
- 5.5
- cve_id
- CVE-2026-77159
- signal_observed_at
- 2026-09-21T23:07:07+00:00
- vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- published_at
- 2026-09-11T11:16:54.677
- last_modified
- 2026-09-16T19:42:43.623
Related Entities (2)
HAS_WEAKNESS (1)
→[Weakness]UNIX Symbolic Link (Symlink) Following
DESCRIBED_BY (1)
→[Source]NVD
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