Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium.
Data as of 6 Nov 2026, 01:05 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 5.5 |
|---|
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 22 Apr 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 5 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Hardened Imagesefivar-main | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10efivar | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7efivar | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8efivar | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9efivar | Affected– | Fixed in– |
| Red Hat OpenShift Container Platform 4openshift/ose-rhel-coreos-8 | Affected– | Fixed in– |
AI-suggested
A security update is available from Red Hat that fixes this vulnerability by enforcing a minimum device path node length check before recursion. Users should apply the updated efivar RPMs (version 39-13.1.hum1) for their architecture. Additionally, applications using efi_loadopt_is_valid() should validate input buffer sizes before passing data to libefiboot. No other mitigation is required as the fix addresses the root cause.
Description
A vulnerability in the libefiboot component of efivar allows a local user to cause a denial of service by triggering infinite recursion due to improper validation of device path node lengths. This flaw can lead to stack exhaustion and process crashes. It affects Red Hat Hardened Images including Red Hat Enterprise Linux 8, 9, and 10, Fedora, and OpenShift Container Platform. A security update is available that addresses this issue by enforcing minimum node length validation.
References
- access.redhat.com/errata/RHSA-2026:69321 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-6862 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- images.redhat.com (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_69321.json (opens in a new tab)