Symlink Following Affecting libvirt-nss package, versions <11.0.0-150700.4.27.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.16% (6th percentile)

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  • Snyk IDSNYK-SLES157-LIBVIRTNSS-19679440
  • published11 Sept 2026
  • disclosed3 Sept 2026

Introduced: 3 Sep 2026

CVE-2026-77159  (opens in a new tab)
CWE-61  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 libvirt-nss to version 11.0.0-150700.4.27.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libvirt-nss package and not the libvirt-nss package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1