The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:16799 advisory.

    Kerberos is a network authentication system, which can improve the security of your network by eliminating     the insecure practice of sending passwords over the network in unencrypted form. It allows clients and     servers to authenticate to each other with the help of a trusted third party, the Kerberos key     distribution center (KDC).

    Security Fix(es):

    * krb5: MIT Kerberos 5 (krb5): Denial of Service via integer underflow and out-of-bounds read     (CVE-2026-40356)

    * krb5: MIT Kerberos 5: Denial of Service via NULL pointer dereference in NegoEx mechanism     (CVE-2026-40355)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

RHEL 8 : krb5 (RHSA-2026:16799)

medium Nessus Plugin ID 314391

Version 1.1