CVE-2026-6862 | efivar libefiboot recursion

VDB-358961 · CVE-2026-6862 · GCVE-0-2026-6862 EFIVAR LIBEFIBOOT RECURSION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.4 $0-$5k 0.25+ Summaryinfo A vulnerability, which was classified as problematic, has been found in efivar. This impacts an unknown function of the component libefiboot. The manipulation leads to recursion. This vulnerability is documented as CVE-2026-6862. The attack needs to be performed locally. There is not any exploit available. Detailsinfo A vulnerability was found in efivar (affected version unknown) and classified as problematic. This issue affects an unknown functionality of the component libefiboot. The manipulation with an unknown input leads to a recursion vulnerability. Using CWE to declare the problem leads to CWE-674. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. Impacted is availability. The summary by CVE is: 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). The advisory is shared at access.redhat.com. The identification of this vulnerability is CVE-2026-6862 since 04/22/2026. The exploitation is known to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Name efivar CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.4 VulDB Meta Temp Score: 4.4 VulDB Base Score: 3.3 VulDB Temp Score: 3.3 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.5 CNA Vector (redhat): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Recursion CWE: CWE-674 / CWE-404 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: Partially Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 04/22/2026 Advisory disclosed 04/22/2026 +0 days CVE reserved 04/22/2026 +0 days VulDB entry created 04/22/2026 +0 days VulDB entry last update Sourcesinfo Advisory: access.redhat.com Status: Not defined CVE: CVE-2026-6862 (🔒) GCVE (CVE): GCVE-0-2026-6862 GCVE (VulDB): GCVE-100-358961 Entryinfo Created: 04/22/2026 17:29 Changes: 04/22/2026 17:29 (59) Complete: 🔍 Cache ID: 99:B05:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸