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      <title>CVE-2026-6862 — Efivar: efivar: denial of service due to stack overflow in device path node parsing</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-6862</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; 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&lt;/p&gt;
&lt;p&gt;A flaw was found in libefiboot, a component of efivar. The device path node parser in libefiboot fails to validate that each node&amp;#39;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).&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; 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&lt;/p&gt;
&lt;p&gt;A flaw was found in libefiboot, a component of efivar. The device path node parser in libefiboot fails to validate that each node&amp;#39;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).&lt;/p&gt;</content:encoded>
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