CVE-2026-6862CWE-674

CVE-2026-6862

Medium · published April 22, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
5.6
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00166 · 5.6th percentile
Weakness
CWE-674 · Uncontrolled Recursion
Published
2026-04-22T18:17Z
Affected products (1)
ProductVersionsFixed in
ubuntu/libefibootall versions—
References (3)
https://access.redhat.com/errata/RHSA-2026:69321 · [email protected]https://access.redhat.com/security/cve/CVE-2026-6862 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2459982 · [email protected]
EPSS history
Timeline
  • 22 APR 13:45Z
    Efivar: efivar: denial of service due to stack overflow in device path node parsing
    cvelistv5