SUNRPC: null pointer dereference in svc_rqst_free(). When alloc_pages_node() returns null in svc_rqst_alloc(), the null rq_scratch_page pointer will be dereferenced when calling put_page() in svc_rqst_free().

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

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：SUNRPC: Fix null pointer dereference in svc_rqst_free() When alloc_pages_node() returns null in svc_rqst_alloc(), the null rq_scratch_page pointer will be dereferenced when calling put_page() in svc_rqst_free(). Fix it by adding a null check.
    Addresses-Coverity: (Dereference after null check) (CVE-2021-47002)

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：SUNRPC: Fix null pointer dereference in svc_rqst_free() When alloc_pages_node() returns null in svc_rqst_alloc(), the null rq_scratch_page pointer will be dereferenced when calling put_page() in svc_rqst_free(). Fix it by adding a null check.
    Addresses-Coverity: (Dereference after null check) (CVE-2021-47002)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

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: SUNRPC: Fix null pointer dereference in svc_rqst_free() When alloc_pages_node() returns null in svc_rqst_alloc(), the null rq_scratch_page pointer will be dereferenced when calling put_page() in svc_rqst_free(). Fix it by adding a null check.
    Addresses-Coverity: (Dereference after null check) (CVE-2021-47002)

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: SUNRPC: Fix null pointer dereference     in svc_rqst_free() When alloc_pages_node() returns null in svc_rqst_alloc(), the null rq_scratch_page     pointer will be dereferenced when calling put_page() in svc_rqst_free(). Fix it by adding a null check.
    Addresses-Coverity: (Dereference after null check) (CVE-2021-47002)

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

An update of the linux package has been released.

ID	Name	Product	Family	Published	Updated	Severity
503605	Siemens SIMATIC Devices NULL Pointer Dereference (CVE-2021-47002)	Tenable OT Security	Tenable.ot	10/27/2025	10/29/2025	medium
245827	Linux Distros 未修補的弱點：CVE-2021-47002	Nessus	Misc.	8/8/2025	7/17/2026	medium
245827	Linux Distros 未修补的漏洞：CVE-2021-47002	Nessus	Misc.	8/8/2025	7/17/2026	medium
245827	Linux Distros のパッチ未適用の脆弱性: CVE-2021-47002	Nessus	Misc.	8/8/2025	7/17/2026	medium
245827	Linux Distros Unpatched Vulnerability : CVE-2021-47002	Nessus	Misc.	8/8/2025	7/17/2026	medium
204097	Photon OS 4.0: Linux PHSA-2024-4.0-0655	Nessus	PhotonOS Local Security Checks	7/24/2024	11/2/2026	high

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