Medium severity5.5NVD Advisory· Published Apr 22, 2026· Updated May 13, 2026
CVE-2026-6862
CVE-2026-6862
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).
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Affected products
3- cpe:2.3:a:ubuntu:libefiboot:-:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
2- access.redhat.com/security/cve/CVE-2026-6862nvdThird Party Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party Advisory
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