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：mac80211: fix skb length check in ieee80211_scan_rx() Replace hard-coded compile-time constants for header length check with dynamic determination based on the frame type. Otherwise, we hit a validation WARN_ON in cfg80211 later. [style fixes, reword commit message] (CVE-2021-47251)

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：mac80211: fix skb length check in ieee80211_scan_rx() Replace hard-coded compile-time constants for header length check with dynamic determination based on the frame type. Otherwise, we hit a validation WARN_ON in cfg80211 later. [style fixes, reword commit message] (CVE-2021-47251)

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: mac80211: fix skb length check in ieee80211_scan_rx() Replace hard-coded compile-time constants for header length check with dynamic determination based on the frame type. Otherwise, we hit a validation WARN_ON in cfg80211 later. [style fixes, reword commit message] (CVE-2021-47251)

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 Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-988946 advisory.

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

    mac80211: fix skb length check in ieee80211_scan_rx()

    Replace hard-coded compile-time constants for header length check     with dynamic determination based on the frame type. Otherwise, we     hit a validation WARN_ON in cfg80211 later.

    [style fixes, reword commit message]

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-2025-987230 advisory.

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

    mac80211: fix skb length check in ieee80211_scan_rx()

    Replace hard-coded compile-time constants for header length check     with dynamic determination based on the frame type. Otherwise, we     hit a validation WARN_ON in cfg80211 later.

    [style fixes, reword commit message]

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: mac80211: fix skb length check in     ieee80211_scan_rx() Replace hard-coded compile-time constants for header length check with dynamic     determination based on the frame type. Otherwise, we hit a validation WARN_ON in cfg80211 later. [style     fixes, reword commit message] (CVE-2021-47251)

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

ID	名稱	產品	系列	已發布	已更新	嚴重性
230123	Linux Distros 未修補的弱點：CVE-2021-47251	Nessus	Misc.	2025/3/5	2026/7/17	high
230123	Linux Distros 未修补的漏洞：CVE-2021-47251	Nessus	Misc.	2025/3/5	2026/7/17	high
230123	Linux Distros のパッチ未適用の脆弱性: CVE-2021-47251	Nessus	Misc.	2025/3/5	2026/7/17	high
273511	Unity Linux 20.1070a Security Update: kernel (UTSA-2025-988946)	Nessus	Unity Linux Local Security Checks	2025/11/5	2025/11/5	high
268266	Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987230)	Nessus	Unity Linux Local Security Checks	2025/10/7	2025/10/15	high
230123	Linux Distros Unpatched Vulnerability : CVE-2021-47251	Nessus	Misc.	2025/3/5	2026/7/17	high

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