PT-2026-63427 · Red Hat · Red Hat Enterprise Linux 10+5

CVE-2026-16552 · Published 2026-07-22 · Updated 2026-07-22

Mitre

CVSS v3.1

6.3

Medium

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H

A flaw was found in systemd-tmpfiles. When processing a tmpfiles.d configuration entry that writes to a file, systemd-tmpfiles can follow a symbolic link placed by an unprivileged local user, and an existing safety check does not detect this specific case because it always treats transitions away from the root user as safe. On systems where a tmpfiles.d configuration targets a path an unprivileged user can influence, this could allow that user to redirect a privileged systemd-tmpfiles write to a file of their choosing, though the content written remains determined by the existing configuration rather than by the unprivileged user. The highest threat from this vulnerability is to integrity.

Fix

Link Following

Weakness Enumeration

CWE-59

Related Identifiers

CVE-2026-16552

Affected Products

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 9

Red Hat Hardened Images

Red Hat Openshift Container Platform 4

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-16552 · Security Note
• https://github.com/systemd/systemd/blob/b9ef5951f8f9e156479494fdb9ca6274cb3d3c53/src/basic/chase.c · Note
• https://github.com/systemd/systemd/blob/b9ef5951f8f9e156479494fdb9ca6274cb3d3c53/src/tmpfiles/tmpfiles.c · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2506073 · Note
• https://access.redhat.com/security/cve/CVE-2026-16552 · Note