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。

  - 在用於 x86 PV 來賓的 Xen 至 4.13.x ] 核心 5.5 至 5.7.9中發現一個問題。攻擊者可能獲得不相關工作的 I/O 連接埠權限。會發生此問題是因為 tss_invalidate_io_bitmap 處理不當造成 TSS 和 Xen 的 I/O 點陣圖之間缺少同步化亦即 CID-cadfad870154。 (CVE-2020-15852)

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。

  - 在 x86 PV 客户机的 Xen 到 4.13.x 中使用的 Linux 内核 5.5 到 5.7.9中发现一个问题。攻击者可能被授予不相关任务的 I/O 端口权限。出现此问题的原因是 tss_invalidate_io_bitmap 处理不当导致 TSS 和 Xen 的 I/O 位图即 CID-cadfad870154 之间失去同步。 (CVE-2020-15852)

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。

  - x86 PV ゲスト用の 4.13.x までの Xen で使用されていた、Linux カーネル 5.5 から 5.7.9に問題が見つかりました。攻撃者に、関連のないタスクの I/O ポート権限が付与される可能性があります。これは、tss_invalidate_io_bitmap の不適切な処理により、TSS および Xen の I/O ビットマップ間の同期の損失が発生するためです別名 CID-cadfad870154。CVE-2020-15852

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-2026-004097 advisory.

    An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in Xen through 4.13.x for x86 PV     guests. An attacker may be granted the I/O port permissions of an unrelated task. This occurs because     tss_invalidate_io_bitmap mishandling causes a loss of synchronization between the I/O bitmaps of TSS and     Xen, aka CID-cadfad870154.

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.

  - An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in Xen through 4.13.x for x86 PV     guests. An attacker may be granted the I/O port permissions of an unrelated task. This occurs because     tss_invalidate_io_bitmap mishandling causes a loss of synchronization between the I/O bitmaps of TSS and     Xen, aka CID-cadfad870154. (CVE-2020-15852)

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-2026-004308 advisory.

    An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in Xen through 4.13.x for x86 PV     guests. An attacker may be granted the I/O port permissions of an unrelated task. This occurs because     tss_invalidate_io_bitmap mishandling causes a loss of synchronization between the I/O bitmaps of TSS and     Xen, aka CID-cadfad870154.

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.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
246734	Linux Distros 未修補的弱點：CVE-2020-15852	Nessus	Misc.	2025/8/9	2025/8/9	high
246734	Linux Distros 未修补的漏洞：CVE-2020-15852	Nessus	Misc.	2025/8/9	2025/8/9	high
246734	Linux Distros のパッチ未適用の脆弱性: CVE-2020-15852	Nessus	Misc.	2025/8/9	2025/8/9	high
288799	Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-004097)	Nessus	Unity Linux Local Security Checks	2026/1/16	2026/1/17	high
246734	Linux Distros Unpatched Vulnerability : CVE-2020-15852	Nessus	Misc.	2025/8/9	2025/8/9	high
288434	Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-004308)	Nessus	Unity Linux Local Security Checks	2026/1/16	2026/1/16	high

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