An update of the linux package has been released.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-987246 advisory.

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

    powerpc/32: Fix hardlockup on vmap stack overflow

    Since the commit c118c7303ad5 (powerpc/32: Fix vmap stack - Do not     activate MMU before reading task struct) a vmap stack overflow     results in a hard lockup. This is because emergency_ctx is still     addressed with its virtual address allthough data MMU is not active     anymore at that time.

    Fix it by using a physical address instead.

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.

Linux/Unix ホストには、ベンダーが提供するパッチが利用できない脆弱性の影響を受ける複数のパッケージがインストールされています。

  - Linux カーネルでは、以下の脆弱性が解決されています: powerpc/32: Fix hardlockup on vmap stack overflow Since the commit c118c7303ad5 (powerpc/32: Fix vmap stack - Do not activate MMU before reading task struct) a vmap stack overflow results in a hard lockup. This is because emergency_ctx is still addressed with its virtual address allthough data MMU is not active anymore at that time. Fix it by using a physical address instead. (CVE-2021-47567)

Nessus は、ベンダーによって報告されたパッケージの存在に依存していることに注意してください。

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

  - In the Linux kernel, the following vulnerability has been resolved: powerpc/32: Fix hardlockup on vmap     stack overflow Since the commit c118c7303ad5 (powerpc/32: Fix vmap stack - Do not activate MMU before     reading task struct) a vmap stack overflow results in a hard lockup. This is because emergency_ctx is     still addressed with its virtual address allthough data MMU is not active anymore at that time. Fix it by     using a physical address instead. (CVE-2021-47567)

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

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-988851 advisory.

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

    powerpc/32: Fix hardlockup on vmap stack overflow

    Since the commit c118c7303ad5 (powerpc/32: Fix vmap stack - Do not     activate MMU before reading task struct) a vmap stack overflow     results in a hard lockup. This is because emergency_ctx is still     addressed with its virtual address allthough data MMU is not active     anymore at that time.

    Fix it by using a physical address instead.

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.

Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且供應商未提供可用的修補程式。

  - 已解決 Linux 核心中的下列弱點：powerpc/32: Fix hardlockup on vmap stack overflow Since the commit c118c7303ad5 (powerpc/32: Fix vmap stack - Do not activate MMU before reading task struct) a vmap stack overflow results in a hard lockup. This is because emergency_ctx is still addressed with its virtual address allthough data MMU is not active anymore at that time. Fix it by using a physical address instead. (CVE-2021-47567)

請注意，Nessus 依賴供應商報告的套件存在。

Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - 已修复 Linux 内核中的下列漏洞：powerpc/32: Fix hardlockup on vmap stack overflow Since the commit c118c7303ad5 (powerpc/32: Fix vmap stack - Do not activate MMU before reading task struct) a vmap stack overflow results in a hard lockup. This is because emergency_ctx is still addressed with its virtual address allthough data MMU is not active anymore at that time. Fix it by using a physical address instead. (CVE-2021-47567)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
151965	Photon OS 4.0: Linux PHSA-2021-4.0-0065	Nessus	PhotonOS Local Security Checks	2021/7/22	2025/10/16	high
269168	Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987246)	Nessus	Unity Linux Local Security Checks	2025/10/7	2025/10/15	medium
247444	Linux Distros のパッチ未適用の脆弱性: CVE-2021-47567	Nessus	Misc.	2025/8/10	2025/8/10	high
247444	Linux Distros Unpatched Vulnerability : CVE-2021-47567	Nessus	Misc.	2025/8/10	2025/8/10	high
272905	Unity Linux 20.1070a Security Update: kernel (UTSA-2025-988851)	Nessus	Unity Linux Local Security Checks	2025/11/5	2025/11/5	medium
247444	Linux Distros 未修補的弱點：CVE-2021-47567	Nessus	Misc.	2025/8/10	2025/8/10	high
247444	Linux Distros 未修补的漏洞：CVE-2021-47567	Nessus	Misc.	2025/8/10	2025/8/10	high

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