PT-2026-67425 · Red Hat · Red Hat Enterprise Linux 10+6

Pavel Cahyna · CVE-2026-18508 · Published 2026-08-03 · Updated 2026-08-03

Mitre

CVSS v3.1

4.4

Medium

Base vector

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

A flaw was found in GNU tar. When extracting an archive with the --one-top-level option, hardlink targets are not confined to the designated top-level directory and may resolve relative to the extraction working directory. A crafted archive can create hardlinks that escape the intended boundary and, when combined with a preexisting symbolic link under the working directory, may allow writing outside that boundary during a single extraction.

Fix

Link Following

Weakness Enumeration

CWE-59

Related Identifiers

CVE-2026-18508

Affected Products

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 6

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 · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-18508 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-18508 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2509843 · Note