{"id":"CVE-2026-6862","title":"A flaw was found in libefiboot, a component of efivar","summary":"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) de…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-674"],"vendor":"ubuntu","product":"libefiboot","affected":["libefiboot"],"published":"2026-04-22","updated":"2026-09-21","sourceUpdated":"2026-09-21T18:17:10.383","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-6862","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:69321","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-6862","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2459982","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6862.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-6862"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6862"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00104,"epssPercentile":0.01153,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-04-22T14:28:03.007164Z"},"ingestedAt":"2026-09-21T11:35:54.437Z","slug":"CVE-2026-6862","body":"## Overview\n\nA 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).\n\n## Affected\n\n- `libefiboot`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Hardened Images, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Hardened Images · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6862.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}