Vulnerability in Red Hat Enterprise Linux 10
CVE-2026-6862
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 · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (5.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-6862 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Third Party Advisory, Issue Tracking)
- access.redhat.com/errata/RHSA-2026:69321 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-6862?
- CVE-2026-6862 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Uncontrolled Recursion. CVSS score: 5.5/10. Published 2026-04-22.
- How severe is CVE-2026-6862?
- Medium severity. CVSS v3 base score is 5.5 out of 10.