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。

  - mediadvbdev采用 refcnt 以避免 UAF 已知dvb_unregister_device() 容易受到释放后使用的影响。
    即即使 file->private_data 中存储的指针仍然引用dvb_unregister_device() 中的清理也会释放 dvb_device。此修补程序将引用计数器添加到 struct dvb_device 中并延迟其解除分配直到没有指针指向该对象为止。 (CVE-2022-50274)

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 主機上安裝了一個或多個受到弱點影響的套件，且廠商未提供可用的修補程式。

  - mediadvbdev採用 refcnt 來避免 UAF dvb_unregister_device() 是已知容易發生釋放後使用的問題。
    也就是說即使 file->private_data 中儲存的指標仍參照該指標來自 dvb_unregister_device() 的清理作業仍會釋放 dvb_device。此修補程式會將參照計數器新增至 struct dvb_device 並延遲其解除配置直到沒有指標參照該物件。 (CVE-2022-50274)

請注意，Nessus 的判定取決於廠商所報告的套件是否存在。

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。

  - mediadvbdevUAF dvb_unregister_device() が use-after-free を起こしやすいことが知られているため、refcnt を採用します。
    つまり、file->private_data に格納されているポインターがまだそれを参照している場合でも、dvb_unregister_device() からのクリーンアップで dvb_device がリリースされます。このパッチは、dvb_device 構造体に参照カウンターを追加し、オブジェクトを参照するポインターがなくなるまで、その割り当て解除を遅らせます。CVE-2022-50274

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-2025-992540 advisory.

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

    media: dvbdev: adopts refcnt to avoid UAF

    dvb_unregister_device() is known that prone to use-after-free.
    That is, the cleanup from dvb_unregister_device() releases the dvb_device     even if there are pointers stored in file->private_data still refer to it.

    This patch adds a reference counter into struct dvb_device and delays its     deallocation until no pointer refers to the object.

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-2025-992936 advisory.

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

    media: dvbdev: adopts refcnt to avoid UAF

    dvb_unregister_device() is known that prone to use-after-free.
    That is, the cleanup from dvb_unregister_device() releases the dvb_device     even if there are pointers stored in file->private_data still refer to it.

    This patch adds a reference counter into struct dvb_device and delays its     deallocation until no pointer refers to the object.

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.

An update of the linux package has been released.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - media: dvbdev: adopts refcnt to avoid UAF dvb_unregister_device() is known that prone to use-after-free.
    That is, the cleanup from dvb_unregister_device() releases the dvb_device even if there are pointers     stored in file->private_data still refer to it. This patch adds a reference counter into struct dvb_device     and delays its deallocation until no pointer refers to the object. (CVE-2022-50274)

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-2025-992205 advisory.

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

    media: dvbdev: adopts refcnt to avoid UAF

    dvb_unregister_device() is known that prone to use-after-free.
    That is, the cleanup from dvb_unregister_device() releases the dvb_device     even if there are pointers stored in file->private_data still refer to it.

    This patch adds a reference counter into struct dvb_device and delays its     deallocation until no pointer refers to the object.

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
264946	Linux Distros 未修补的漏洞：CVE-2022-50274	Nessus	Misc.	2025/9/16	2025/10/28	high
264946	Linux Distros 未修補的弱點：CVE-2022-50274	Nessus	Misc.	2025/9/16	2025/10/28	high
264946	Linux Distros のパッチ未適用の脆弱性: CVE-2022-50274	Nessus	Misc.	2025/9/16	2025/10/28	high
297592	EulerOS 2.0 SP13 : kernel (EulerOS-SA-2026-1224)	Nessus	Huawei Local Security Checks	2026/2/2	2026/2/4	high
302971	EulerOS Virtualization 2.13.0 : kernel (EulerOS-SA-2026-1629)	Nessus	Huawei Local Security Checks	2026/3/18	2026/3/18	high
280653	Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-992540)	Nessus	Unity Linux Local Security Checks	2025/12/30	2025/12/30	high
281105	Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992936)	Nessus	Unity Linux Local Security Checks	2025/12/31	2025/12/31	high
153035	Photon OS 4.0: Linux PHSA-2021-4.0-0095	Nessus	PhotonOS Local Security Checks	2021/9/7	2026/3/4	high
264946	Linux Distros Unpatched Vulnerability : CVE-2022-50274	Nessus	Misc.	2025/9/16	2025/10/28	high
280551	Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-992205)	Nessus	Unity Linux Local Security Checks	2025/12/30	2025/12/30	high
302981	EulerOS Virtualization 2.13.1 : kernel (EulerOS-SA-2026-1637)	Nessus	Huawei Local Security Checks	2026/3/18	2026/3/18	high
297598	EulerOS 2.0 SP13 : kernel (EulerOS-SA-2026-1212)	Nessus	Huawei Local Security Checks	2026/2/2	2026/2/4	high

检测

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