In the Linux kernel, the following vulnerability has been resolved: selinux: allow multiple opens of /sys/fs/selinux/policy Currently there can only be a single open of /sys/fs/selinux/policy at any time. This allows any process to block any other process from reading the kernel policy. The original motivation seems to have been a mix of preventing an inconsistent view of the policy size and preventing userspace from allocating kernel memory without bound, but this is arguably equally bad. Eliminate the policy_opened flag and shrink the critical section that the policy mutex is held. While we are making changes here, drop a couple of extraneous BUG_ONs.

euleros EulerOS-SA-2026-3644: An update for kernel is now available for EulerOS Virtualization release 2.12.0

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098839 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    selinux: allow multiple opens of /sys/fs/selinux/policy

    Currently there can only be a single open of /sys/fs/selinux/policy at     any time. This allows any process to block any other process from     reading the kernel policy. The original motivation seems to have been     a mix of preventing an inconsistent view of the policy size and     preventing userspace from allocating kernel memory without bound, but     this is arguably equally bad. Eliminate the policy_opened flag and     shrink the critical section that the policy mutex is held. While we     are making changes here, drop a couple of extraneous BUG_ONs.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

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

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-102001 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    selinux: allow multiple opens of /sys/fs/selinux/policy

    Currently there can only be a single open of /sys/fs/selinux/policy at     any time. This allows any process to block any other process from     reading the kernel policy. The original motivation seems to have been     a mix of preventing an inconsistent view of the policy size and     preventing userspace from allocating kernel memory without bound, but     this is arguably equally bad. Eliminate the policy_opened flag and     shrink the critical section that the policy mutex is held. While we     are making changes here, drop a couple of extraneous BUG_ONs.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - selinux: allow multiple opens of /sys/fs/selinux/policy Currently there can only be a single open of     /sys/fs/selinux/policy at any time. This allows any process to block any other process from reading the     kernel policy. The original motivation seems to have been a mix of preventing an inconsistent view of the     policy size and preventing userspace from allocating kernel memory without bound, but this is arguably     equally bad. Eliminate the policy_opened flag and shrink the critical section that the policy mutex is     held. While we are making changes here, drop a couple of extraneous BUG_ONs. (CVE-2026-46302)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
347286	EulerOS Virtualization 2.12.1 : kernel (EulerOS-SA-2026-3590)	Nessus	Huawei Local Security Checks	Local	high
343747	EulerOS 2.0 SP12 : kernel (EulerOS-SA-2026-3345)	Nessus	Huawei Local Security Checks	Local	high
343617	EulerOS 2.0 SP12 : kernel (EulerOS-SA-2026-3270)	Nessus	Huawei Local Security Checks	Local	high
343532	Ubuntu 24.04 LTS / Pro Realtime 24.04 LTS : Linux kernel (GCP) vulnerabilities (USN-8728-1)	Nessus	Ubuntu Local Security Checks	Local	high
340681	Ubuntu 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS : Linux kernel (NVIDIA) vulnerabilities (USN-8663-1)	Nessus	Ubuntu Local Security Checks	Local	high
340526	Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098839)	Nessus	Unity Linux Local Security Checks	Local	medium
340045	Ubuntu 26.04 LTS : Linux kernel (NVIDIA BaseOS) vulnerabilities (USN-8664-1)	Nessus	Ubuntu Local Security Checks	Local	high
337293	Unity Linux 20.1050e Security Update: kernel (UTSA-2026-102001)	Nessus	Unity Linux Local Security Checks	Local	medium
319923	Linux Distros Unpatched Vulnerability : CVE-2026-46302	Nessus	Misc.	Local	medium

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