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。

  - 遇到引用 14 个或更多 SVCB/HTTPS ServiceMode 记录的 SVCB/HTTPS AliasMode 记录的 BIND 解析器可能无法正确解除内部资源分配。如果这种情况反复发生，资源耗尽最终将阻止解析器执行新的递归查找。此问题影响 BIND 9 版本9.18.09.18.50到 、 到 9.20.09.20.27、 9.21.09.21.25到 9.18.11-S1 到 9.18.50-S1，以及 9.20.9-S1 到 9.20.27-S1。（CVE-2026-81563）

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。

  - 如果 BIND 剖析器遇到參照 14 個以上 SVCB/HTTPS ServiceMode 記錄的 SVCB/HTTPS AliasMode 記錄，可能無法正確解除配置內部資源。如果這種情況反覆發生，資源耗盡最終會阻止解析器執行新的遞迴查詢。此問題會影響 BIND 9 版本 9.18.09.18.50（至 、 至 9.20.09.20.27、 9.21.09.21.25至 、 9.18.11-S1 至 9.18.50-S1 和 9.20.9-S1 至 9.20.27-S1）。（CVE-2026-81563）

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。

  - BIND リゾルバーが、14 以上の SVCB/HTTPS ServiceMode レコードを参照している SVCB/HTTPS AliasMode レコードに遭遇した場合、内部リソースの適切な割り当て解除に失敗する可能性があります。これが繰り返し発生すると、リソースの枯渇により、最終的にリゾルバーは新しい再帰的検索を実行できなくなります。この問題は、BIND 9のバージョン 9.18.0 から 9.18.50、 9.20.0 から 9.20.27、 9.21.0 から 9.21.25、9.18.11-S1から9.18.50-S1、9.20.9-S1から9.20.27-S1に影響します。(CVE-2026-81563)

Nessus は、ベンダーから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.

  - A BIND resolver encountering an SVCB/HTTPS AliasMode record referencing 14 or more SVCB/HTTPS ServiceMode     records may fail to properly deallocate internal resources. If this happens repeatedly, resource     exhaustion will eventually prevent the resolver from performing new recursive lookups. This issue affects     BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.18.11-S1 through     9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1. (CVE-2026-81563)

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

The version of ISC BIND running on the remote host is 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, or 9.21.0 through 9.21.25. Supported Preview Edition releases 9.18.11-S1 through 9.18.50-S1 and 9.20.9-S1 through 9.20.27-S1 are also affected. It is, therefore, affected by multiple vulnerabilities :

  - A BIND resolver encountering an SVCB/HTTPS AliasMode record referencing 14 or more SVCB/HTTPS ServiceMode     records may fail to properly deallocate internal resources. If this happens repeatedly, resource exhaustion     will eventually prevent the resolver from performing new recursive lookups. (CVE-2026-81563)

  - If a BIND resolver has cached a tree of SVCB/HTTPS AliasMode records, and is then queried for the root of     that tree, the resolver will spend disproportionate CPU time constructing the response. (CVE-2026-81736)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6505 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6505-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     September 17, 2026                    https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : bind9     CVE ID         : CVE-2026-19033 CVE-2026-19662 CVE-2026-19666 CVE-2026-19667                      CVE-2026-19668 CVE-2026-75029 CVE-2026-76163 CVE-2026-77119                      CVE-2026-77692 CVE-2026-80274 CVE-2026-81563 CVE-2026-81736

    Several vulnerabilities were discovered in BIND, a DNS server implementation,     which may result in denial of service or cache poisoning.

    For the stable distribution (trixie), these problems have been fixed in     version 1:9.20.29-1~deb13u1.

    We recommend that you upgrade your bind9 packages.

    For the detailed security status of bind9 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/bind9

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues 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
346645	Linux Distros 未修补的漏洞：CVE-2026-81563	Nessus	Misc.	2026/9/16	2026/9/18	high
346645	Linux Distros 未修補弱點：CVE-2026-81563	Nessus	Misc.	2026/9/16	2026/9/18	high
346645	Linux Distros のパッチ未適用の脆弱性: CVE-2026-81563	Nessus	Misc.	2026/9/16	2026/9/18	high
346645	Linux Distros Unpatched Vulnerability : CVE-2026-81563	Nessus	Misc.	2026/9/16	2026/9/18	high
347971	ISC BIND 9.18.0 < 9.20.29 / 9.18.11-S1 < 9.20.29-S1 / 9.20.0 < 9.20.29 / 9.20.9-S1 < 9.20.29-S1 / 9.21.0 < 9.21.26 Multiple Vulnerabilities	Nessus	DNS	2026/9/18	2026/9/18	high
346980	Debian dsa-6505 : bind9 - security update	Nessus	Debian Local Security Checks	2026/9/17	2026/9/17	medium

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