Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-6862
Red Hat Red Hat Hardened Images — Efivar: efivar: denial of service due to stack overflow in device path node parsing
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L N R U N N H 5.5 .0017 5.3 —
AFFECTED
Product Versions Fixed
Red Hat Hardened Images unspecified 39-13.1.hum1
Red Hat Enterprise Linux 10 unspecified —
Red Hat Enterprise Linux 7 unspecified —
Red Hat Enterprise Linux 8 unspecified —
Red Hat Enterprise Linux 9 unspecified —
Red Hat OpenShift Container Platform 4 unspecified —
Red Hat OpenShift Container Platform 4 unspecified —
TIMELINE
Apr 22 Reserved by redhat
Apr 22 Published (CNA: redhat)
Sep 21 PATCH SHIPPED — CVE-2026-6862 (Red Hat Hardened Images). Fixed in Red Hat Hardened Images 39-13.1.hum1.
Description
A flaw was found in libefiboot, a component of efivar. The device path node parser in libefiboot fails to validate that each node's Length field is at least 4 bytes, which is the minimum size for an EFI (Extensible Firmware Interface) device path node header. A local user could exploit this vulnerability by providing a specially crafted device path node. This can lead to infinite recursion, causing stack exhaustion and a process crash, resulting in a denial of service (DoS).
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| April 22, 2026 | Reserved | Reserved by redhat |
| April 22, 2026 | Published | Published (CNA: redhat) |
| September 21, 2026 | PATCH SHIPPED | PATCH SHIPPED — CVE-2026-6862 (Red Hat Hardened Images). Fixed in Red Hat Hardened Images 39-13.1.hum1. |
Affected
Affected products and packages — 7 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Hardened Images | — | — | 39-13.1.hum1 |
| 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 OpenShift Container Platform 4 | — | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-6862 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
