Dashboard / CVE-2026-6862

CVE-2026-6862

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 36/100
Published: 2026-04-22 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Low Complexity No Auth

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: Required
S: Unchanged
C: None
I: None
A: High

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).

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
ubuntu libefiboot -

References & Advisories (3)

https://bugzilla.redhat.com/show_bug.cgi?id=2459982
Issue Tracking Third Party Advisory

Bug Bounty Relevance

36 / 100
✓ No authentication
✓ Low complexity

CVSS Score

5.5 / 10.0 v3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.12%
Raw Score 0.001170
Percentile 1.6%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00117
2026-10-28
0.00117

Intelligence Sources

nvd ref →

External Links