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：RDMA/rtrs-clt: destroy sysfs after removing session from active list A session can be removed dynamically by sysfs interface remove_path that eventually calls rtrs_clt_remove_path_from_sysfs function. The current rtrs_clt_remove_path_from_sysfs first removes the sysfs interfaces and frees sess->stats object. Second it removes the session from the active list. Therefore some functions could access non-connected session and access the freed sess->stats object even-if they check the session status before accessing the session.
    For instance rtrs_clt_request and get_next_path_min_inflight check the session status and try to send IO to the session. The session status could be changed when they are trying to send IO but they could not catch the change and update the statistics information in sess->stats object, and generate use-after-free problem. (see: RDMA/rtrs-clt: Check state of the rtrs_clt_sess before reading its stats) This patch changes the rtrs_clt_remove_path_from_sysfs to remove the session from the active session list and then destroy the sysfs interfaces. Each function still should check the session status because closing or error recovery paths can change the status. (CVE-2021-47026)

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：RDMA/rtrs-clt: destroy sysfs after removing session from active list A session can be removed dynamically by sysfs interface remove_path that eventually calls rtrs_clt_remove_path_from_sysfs function. The current rtrs_clt_remove_path_from_sysfs first removes the sysfs interfaces and frees sess->stats object. Second it removes the session from the active list. Therefore some functions could access non-connected session and access the freed sess->stats object even-if they check the session status before accessing the session.
    For instance rtrs_clt_request and get_next_path_min_inflight check the session status and try to send IO to the session. The session status could be changed when they are trying to send IO but they could not catch the change and update the statistics information in sess->stats object, and generate use-after-free problem. (see: RDMA/rtrs-clt: Check state of the rtrs_clt_sess before reading its stats) This patch changes the rtrs_clt_remove_path_from_sysfs to remove the session from the active session list and then destroy the sysfs interfaces. Each function still should check the session status because closing or error recovery paths can change the status. (CVE-2021-47026)

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: RDMA/rtrs-clt: destroy sysfs after removing session from active list A session can be removed dynamically by sysfs interface remove_path that eventually calls rtrs_clt_remove_path_from_sysfs function. The current rtrs_clt_remove_path_from_sysfs first removes the sysfs interfaces and frees sess->stats object. Second it removes the session from the active list. Therefore some functions could access non-connected session and access the freed sess->stats object even-if they check the session status before accessing the session.
    For instance rtrs_clt_request and get_next_path_min_inflight check the session status and try to send IO to the session. The session status could be changed when they are trying to send IO but they could not catch the change and update the statistics information in sess->stats object, and generate use-after-free problem. (see: RDMA/rtrs-clt: Check state of the rtrs_clt_sess before reading its stats) This patch changes the rtrs_clt_remove_path_from_sysfs to remove the session from the active session list and then destroy the sysfs interfaces. Each function still should check the session status because closing or error recovery paths can change the status. (CVE-2021-47026)

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: RDMA/rtrs-clt: destroy sysfs after     removing session from active list A session can be removed dynamically by sysfs interface remove_path     that eventually calls rtrs_clt_remove_path_from_sysfs function. The current     rtrs_clt_remove_path_from_sysfs first removes the sysfs interfaces and frees sess->stats object. Second it     removes the session from the active list. Therefore some functions could access non-connected session and     access the freed sess->stats object even-if they check the session status before accessing the session.
    For instance rtrs_clt_request and get_next_path_min_inflight check the session status and try to send IO     to the session. The session status could be changed when they are trying to send IO but they could not     catch the change and update the statistics information in sess->stats object, and generate use-after-free     problem. (see: RDMA/rtrs-clt: Check state of the rtrs_clt_sess before reading its stats) This patch     changes the rtrs_clt_remove_path_from_sysfs to remove the session from the active session list and then     destroy the sysfs interfaces. Each function still should check the session status because closing or error     recovery paths can change the status. (CVE-2021-47026)

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

ID	Name	Product	Family	Published	Updated	Severity
243649	Linux Distros 未修補的弱點：CVE-2021-47026	Nessus	Misc.	8/5/2025	7/17/2026	high
243649	Linux Distros 未修补的漏洞：CVE-2021-47026	Nessus	Misc.	8/5/2025	7/17/2026	high
243649	Linux Distros のパッチ未適用の脆弱性: CVE-2021-47026	Nessus	Misc.	8/5/2025	7/17/2026	high
243649	Linux Distros Unpatched Vulnerability : CVE-2021-47026	Nessus	Misc.	8/5/2025	7/17/2026	high
239841	TencentOS Server 4: kernel (TSSA-2024:0960)	Nessus	Tencent Local Security Checks	6/16/2025	11/23/2025	critical

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