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CVE-2026-16552

MEDIUM
6.3
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-16552
State
PUBLISHED
Assigner
redhat
Reserved
2026-07-22 11:11 UTC
Published
2026-07-22 15:55 UTC
Last updated
2026-07-22 16:08 UTC
Primary CWE
CWE-59
Improper Link Resolution Before File Access ('Link Following…
Vendor / Product
Red Hat / Red Hat Enterprise Linux 10
Sources
cve.org  ·  NVD

Severity & Metrics

6.3 MEDIUM CVSS 3.1
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (6)
VendorProductPlatformVersions
Red Hat Red Hat Enterprise Linux 10 — —
Red Hat Red Hat Enterprise Linux 7 — —
Red Hat Red Hat Enterprise Linux 8 — —
Red Hat Red Hat Enterprise Linux 9 — —
Red Hat Red Hat Hardened Images — —
Red Hat Red Hat OpenShift Container Platform 4 — —
Weakness (CWE)
CWESourceDescription
CWE-59 cna Improper Link Resolution Before File Access ('Link Following')
CVSS scores (1)
ScoreSeverityVersionSourceVector
6.3 MEDIUM 3.1 cna CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
References (4)
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