检测

Linux Distros 未修补的漏洞：CVE-2026-39821

high Nessus 插件 ID 317039

语言：

简介

Linux/Unix 主机上安装的一个或多个程序包存在漏洞，但供应商表示不会修补此漏洞。

描述

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。

 - ToASCII 和 ToUnicode 函数未正确接受解码为仅 ASCII 标签的 Punycode 编码标签。例如，ToUnicode（xn--example-.com） 错误地返回名称 example.com 而不是错误。此行为可导致使用 idna 程序包的程序中的权限升级。例如，对 ASCII 主机名执行权限检查的程序可能拒绝 example.com 但允许 xn--example-.com。如果该程序随后将 ASCII 主机名转换为 Unicode，它将无意中允许访问该 Unicode 名称 example.com。（CVE-2026-39821）

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

解决方案

目前尚未有任何已知的解决方案。

另见

https://access.redhat.com/security/cve/cve-2026-39821

https://security-tracker.debian.org/tracker/CVE-2026-39821

插件详情

严重性: High

ID: 317039

文件名: unpatched_CVE_2026_39821.nasl

版本: 1.16

类型: Local

代理: unix

系列: Misc.

发布时间: 2026/5/27

最近更新时间: 2026/7/16

支持的传感器: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

风险信息

VPR

风险因素: Medium

分数: 4.8

百分位: 57.7

CVSS v2

风险因素: High

基本分数: 7.5

时间分数: 6.4

矢量: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS 分数来源: CVE-2026-39821

CVSS v3

风险因素: High

基本分数: 8.2

时间分数: 7.5

矢量: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

时间矢量: CVSS:3.0/E:U/RL:U/RC:C

漏洞信息

CPE: p-cpe:/a:redhat:enterprise_linux:osbuild-composer, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:redhat:enterprise_linux:golang-docs, p-cpe:/a:redhat:enterprise_linux:golang-src, p-cpe:/a:centos:centos:golang-docs, p-cpe:/a:redhat:enterprise_linux:osbuild-composer-worker, p-cpe:/a:debian:debian_linux:golang-golang-x-net, p-cpe:/a:centos:centos:go-fdo-server-owner, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:centos:centos:go-fdo-server, p-cpe:/a:redhat:enterprise_linux:go-fdo-client, p-cpe:/a:redhat:enterprise_linux:rhc-worker-script, p-cpe:/a:redhat:enterprise_linux:ignition-validate, p-cpe:/a:centos:centos:rhc, p-cpe:/a:centos:centos:ignition, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:rhc-worker-playbook, p-cpe:/a:centos:centos:trustee-guest-components, p-cpe:/a:redhat:enterprise_linux:go-fdo-server-owner, p-cpe:/a:redhat:enterprise_linux:go-fdo-server-manufacturer, p-cpe:/a:redhat:enterprise_linux:gvisor-tap-vsock-gvforwarder, p-cpe:/a:redhat:enterprise_linux:delve, p-cpe:/a:redhat:enterprise_linux:osbuild-composer-core, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:ignition-grub, p-cpe:/a:redhat:enterprise_linux:ignition, p-cpe:/a:redhat:enterprise_linux:golang, p-cpe:/a:redhat:enterprise_linux:golang-bin, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:redhat:enterprise_linux:go-toolset, p-cpe:/a:centos:centos:golang-race, p-cpe:/a:centos:centos:osbuild-composer, p-cpe:/a:redhat:enterprise_linux:ipp-usb, p-cpe:/a:redhat:enterprise_linux:osbuild-composer-dnf-json, p-cpe:/a:centos:centos:golang-misc, p-cpe:/a:centos:centos:image-builder, p-cpe:/a:centos:centos:osbuild-composer-dnf-json, p-cpe:/a:centos:centos:golang-src, p-cpe:/a:redhat:enterprise_linux:go-fdo-server-rendezvous, p-cpe:/a:centos:centos:osbuild-composer-worker, p-cpe:/a:centos:centos:go-fdo-server-rendezvous, p-cpe:/a:centos:centos:golang, p-cpe:/a:centos:centos:golang-bin, p-cpe:/a:centos:centos:ignition-validate, p-cpe:/a:centos:centos:ipp-usb, p-cpe:/a:centos:centos:golang-tests, p-cpe:/a:redhat:enterprise_linux:go-fdo-server, p-cpe:/a:redhat:enterprise_linux:golang-tests, p-cpe:/a:redhat:enterprise_linux:image-builder, p-cpe:/a:redhat:enterprise_linux:golang-misc, p-cpe:/a:redhat:enterprise_linux:rhc-worker-playbook, p-cpe:/a:redhat:enterprise_linux:trustee-guest-components, cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:go-fdo-client, p-cpe:/a:centos:centos:go-fdo-server-manufacturer, p-cpe:/a:centos:centos:golang-github-openprinting-ipp-usb, p-cpe:/a:redhat:enterprise_linux:ignition-grub, p-cpe:/a:redhat:enterprise_linux:butane, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:golang-race, p-cpe:/a:centos:centos:butane, p-cpe:/a:redhat:enterprise_linux:golang-github-openprinting-ipp-usb, p-cpe:/a:redhat:enterprise_linux:gvisor-tap-vsock, p-cpe:/a:redhat:enterprise_linux:rhc, p-cpe:/a:centos:centos:gvisor-tap-vsock-gvforwarder, p-cpe:/a:centos:centos:ignition-edge, p-cpe:/a:redhat:enterprise_linux:ignition-edge, p-cpe:/a:centos:centos:rhc-worker-script, p-cpe:/a:centos:centos:delve, p-cpe:/a:centos:centos:go-toolset, p-cpe:/a:centos:centos:gvisor-tap-vsock, p-cpe:/a:centos:centos:osbuild-composer-core

必需的 KB 项: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier

易利用性: No known exploits are available

漏洞发布日期: 2026/5/22

参考资料信息

CVE: CVE-2026-39821