1. 修复的CVE CVE-2021-3997 systemd是一款基于Linux的系统和服务管理器。该产品兼容了SysV和LSB的启动脚本，且提供了一个用来表示系统服务间依赖关系的框架。 systemd 存在安全漏洞，该漏洞是由于systemd-tmpfiles中不受控制的递归而存在的。本地用户可以在tmp文件夹中创建多个嵌套目录，case systemd会在系统启动时崩溃。该漏洞允许本地用户执行拒绝服务(DoS)攻击。 2. 受影响的操作系统及软件包 ·银河麒麟桌面操作系统V10 SP1 x86_64 架构： libnss-myhostname、libnss-mymachines、libnss-resolve、libnss-systemd、libpam-systemd、libsystemd0、libudev1、systemd-container、systemd-coredump、systemd-journal-remote、systemd-sysv、systemd-tests、systemd-timesyncd、systemd、udev arm64 架构： libnss-myhostname、libnss-mymachines、libnss-resolve、libnss-systemd、libpam-systemd、libsystemd0、libudev1、systemd-container、systemd-coredump、systemd-journal-remote、systemd-sysv、systemd-tests、systemd-timesyncd、systemd、udev mips64el 架构： libnss-myhostname、libnss-mymachines、libnss-resolve、libnss-systemd、libpam-systemd、libsystemd0、libudev1、systemd-container、systemd-coredump、systemd-journal-remote、systemd-sysv、systemd-tests、systemd-timesyncd、systemd、udev loongarch64 架构： 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