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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).

PUBLISHED Reserved 2026-04-22 | Published 2026-04-22 | Updated 2026-04-22 | Assigner redhat




MEDIUM: 5.5CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Problem types

Uncontrolled Recursion

Product status

Default status
unknown

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unknown

Timeline

2026-04-09:Reported to Red Hat.
2026-04-09:Made public.

Credits

Red Hat would like to thank Mathis Huron (Oteria Cyber School, FuzzingLabs) for reporting this issue.

References

access.redhat.com/security/cve/CVE-2026-6862 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2459982 (RHBZ#2459982) issue-tracking

cve.org (CVE-2026-6862)

nvd.nist.gov (CVE-2026-6862)

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