CVE-2026-6862
Last modified
CVE-2026-6862 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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. EPSS estimates a 0.10% chance of exploitation in the next 30 days.
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).
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu | Libefiboot | All versions |
References
- https://access.redhat.com/security/cve/CVE-2026-6862Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2459982Issue Tracking, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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