Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 4.4 Medium.
Data as of 30 Oct 2026, 16:21 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 4.4 |
|---|
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 3 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10tar | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8tar | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9tar | Affected– | Fixed in– |
| Red Hat Discovery 2discovery/discovery-server-rhel9 | Affected– | Fixed in– |
| Red Hat Hardened Imagestar-main | Affected– | Fixed in– |
| Red Hat Update Infrastructure 5rhui5/cds-kubernetes-rhel9 | Affected– | Fixed in– |
AI-suggested
Red Hat advises not to use the --one-top-level option as the sole confinement mechanism when extracting untrusted archives. Instead, extract archives as an unprivileged user into a newly created empty directory after changing into that directory. Avoid extracting as root from sensitive directories such as /. Follow GNU tar security guidance for handling untrusted archives. Updated packages addressing this issue are available from Red Hat and should be applied when possible.
Description
A vulnerability in GNU tar affects the --one-top-level extraction option, allowing hardlink targets to escape the designated top-level directory. This can enable an attacker to write files outside the intended extraction boundary if combined with a preexisting symbolic link in the working directory. The issue only occurs when extracting untrusted archives using --one-top-level and does not affect default tar extraction without this option. Red Hat Enterprise Linux is affected, and users are advised not to rely solely on --one-top-level for confinement until fixed packages are available.
References
- access.redhat.com/errata/RHSA-2026:50807 (opens in a new tab)
- images.redhat.com (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-18508 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_50807.json (opens in a new tab)