The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:39983 advisory.

    The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with     extremely high determinism requirements.

    Security Fix(es):

    * kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup (CVE-2026-43027)

    * kernel: rtmutex: Use waiter::task instead of current in remove_waiter() (CVE-2026-43499)

    * kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected GFN (CVE-2026-46113)

    * kernel: futex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock     (CVE-2026-53166)

    * kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role (CVE-2026-53359)

    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 9 : kernel-rt (RHSA-2026:39983)

high Nessus Plugin ID 327095

Version 1.2

Version 1.1

Version 1.2 Jul 27, 2026, 10:22 AM CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:H/RL:OF/RC:C") CVSS temporal metrics ("CVSSv3 temporal vector" set to "CVSS:3.0/E:H/RL:O/RC:C") Exploit attributes ("Exploited by malware" set to "True") Plugin Feed: 202607271022
Version 1.1 Jul 16, 2026, 4:10 AM New Plugin Feed: 202607160410