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Highest advisory severityMedium 1 vendor · 1 advisory

CVE-2026-6862

CVE-2026-6862: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Vendor advisory comparison

Red Hat

1 advisory
  • Advisory severityMedium5.5

    Medium [CVE-2026-6862] Efivar: efivar: denial of service due to stack overflow in device path node parsing

    CVE-2026-6862Source published Source updated

    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). Moderate impact. A stack overflow vulnerability in `libefiboot` (part of `efivar`) can lead to a process crash due to unbounded recursion when parsing a specially crafted device path node. This flaw affects Red Hat Enterprise Linux 8, 9, and 10, as well as Fedora and OpenShift Container Platform. Red Hat severity…

    Affected products in this advisory
    • Red Hat Hardened Images
    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • efivar-main-39-13.1.hum1
    • RHSA-2026:69321
    Mitigation guidance
    • Applications using efi_loadopt_is_valid() should validate the size of the input buffer before passing it to libefiboot. As a library-level fix, the device path iterator should enforce a minimum node Length of 4 before recursing: if (dp->length < 4) return -1;
    Full advisory and evidenceOpen source bulletin

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