The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-986717 advisory.

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

    mptcp: Fix out of bounds when parsing TCP options

    The TCP option parser in mptcp (mptcp_get_options) could read one byte     out of bounds. When the length is 1, the execution flow gets into the     loop, reads one byte of the opcode, and if the opcode is neither     TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the     length of 1.

    This fix is inspired by commit 9609dad263f8 (ipv4: tcp_input: fix stack     out of bounds when parsing TCP options.).

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.

  - In the Linux kernel, the following vulnerability has been resolved: mptcp: Fix out of bounds when parsing     TCP options The TCP option parser in mptcp (mptcp_get_options) could read one byte out of bounds. When the     length is 1, the execution flow gets into the loop, reads one byte of the opcode, and if the opcode is     neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the length of 1. This fix is     inspired by commit 9609dad263f8 (ipv4: tcp_input: fix stack out of bounds when parsing TCP options.).
    (CVE-2021-47244)

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-2025-989100 advisory.

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

    mptcp: Fix out of bounds when parsing TCP options

    The TCP option parser in mptcp (mptcp_get_options) could read one byte     out of bounds. When the length is 1, the execution flow gets into the     loop, reads one byte of the opcode, and if the opcode is neither     TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the     length of 1.

    This fix is inspired by commit 9609dad263f8 (ipv4: tcp_input: fix stack     out of bounds when parsing TCP options.).

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：mptcp: Fix out of bounds when parsing TCP options The TCP option parser in mptcp (mptcp_get_options) could read one byte out of bounds. When the length is 1, the execution flow gets into the loop, reads one byte of the opcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the length of 1. This fix is inspired by commit 9609dad263f8 (ipv4: tcp_input: fix stack out of bounds when parsing TCP options.).
    (CVE-2021-47244)

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: mptcp: Fix out of bounds when parsing TCP options The TCP option parser in mptcp (mptcp_get_options) could read one byte out of bounds. When the length is 1, the execution flow gets into the loop, reads one byte of the opcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the length of 1. This fix is inspired by commit 9609dad263f8 (ipv4: tcp_input: fix stack out of bounds when parsing TCP options.).
    (CVE-2021-47244)

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。

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：mptcp: Fix out of bounds when parsing TCP options The TCP option parser in mptcp (mptcp_get_options) could read one byte out of bounds. When the length is 1, the execution flow gets into the loop, reads one byte of the opcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the length of 1. This fix is inspired by commit 9609dad263f8 (ipv4: tcp_input: fix stack out of bounds when parsing TCP options.).
    (CVE-2021-47244)

請注意，Nessus 依賴供應商報告的套件存在。

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
267978	Unity Linux 20.1070e Security Update: kernel (UTSA-2025-986717)	Nessus	Unity Linux Local Security Checks	2025/10/7	2025/10/15	medium
253780	Linux Distros Unpatched Vulnerability : CVE-2021-47244	Nessus	Misc.	2025/8/24	2025/8/24	medium
273117	Unity Linux 20.1070a Security Update: kernel (UTSA-2025-989100)	Nessus	Unity Linux Local Security Checks	2025/11/5	2025/11/5	medium
253780	Linux Distros 未修补的漏洞：CVE-2021-47244	Nessus	Misc.	2025/8/24	2025/8/24	medium
253780	Linux Distros のパッチ未適用の脆弱性: CVE-2021-47244	Nessus	Misc.	2025/8/24	2025/8/24	medium
253780	Linux Distros 未修補的弱點：CVE-2021-47244	Nessus	Misc.	2025/8/24	2025/8/24	medium

检测

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