systemd: systemd-tmpfiles symlink-redirected arbitrary file overwrite via a CHASE_SAFE root-to-unprivileged ownership transition bypass
Published Jul 22, 2026
6.3
MEDIUMCVSS 3.1
Description
Rejected reason: The reported issue is invalid, as it requires root privileges to reproduce, and it is out of scope of the threat model of the affected component.
Affected products
No data.
No data.
No data.
Red Hat Enterprise Linux 10
systemd
Not affected
Red Hat Enterprise Linux 7
systemd
Not affected
Red Hat Enterprise Linux 8
systemd
Not affected
Red Hat Enterprise Linux 9
systemd
Not affected
Red Hat Hardened Images
systemd
Not affected
Red Hat OpenShift Container Platform 4
systemd
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | systemd | Not affected | n/a |
| Red Hat Enterprise Linux 7 | systemd | Not affected | n/a |
| Red Hat Enterprise Linux 8 | systemd | Not affected | n/a |
| Red Hat Enterprise Linux 9 | systemd | Not affected | n/a |
| Red Hat Hardened Images | systemd | Not affected | n/a |
| Red Hat OpenShift Container Platform 4 | systemd | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This CVE has been marked as rejected by the assigning CNA.
Red Hat mitigation
Restrict or audit any custom tmpfiles.d configuration entries (e.g. authored via configuration-management tooling) that use the 'w' item type against paths under /run/user/*, per-user home directories, or other locations where an unprivileged user can influence path resolution, until an upstream fix is available.
References (7)
- https://access.redhat.com/security/cve/CVE-2026-16552 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2506073 Issue Tracking
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-47736 Advisory
- https://github.com/systemd/systemd/blob/b9ef5951f8f9e156479494fdb9ca6274cb3d3c53/src/basic/chase.c
- https://github.com/systemd/systemd/blob/b9ef5951f8f9e156479494fdb9ca6274cb3d3c53/src/tmpfiles/tmpfiles.c
- https://nvd.nist.gov/vuln/detail/CVE-2026-16552
- https://www.cve.org/CVERecord?id=CVE-2026-16552
Change history (0)
No recorded changes yet.