CVE-2026-64614— Data::Deque::Shared versions before 0.06 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW

Data::Deque::Shared versions before 0.06 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW

Data::Deque::Shared versions before 0.06 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW. The segment is created in deque.h with open(path, O_RDWR|O_CREAT, 0666). The mode is 0666, so under the default umask 022 the file is created mode 0644 (world-readable). O_NOFOLLOW is absent, so a symlink planted at the path is followed, and O_EXCL is absent, so the open silently uses a pre-planted file instead of failing. A "Shared" segment naturally lives in a shared directory such as /tmp or /dev/shm, where any local user can read the IPC payloads stored in the world-readable segment, and a pre-planted file or symlink at the path lets a local attacker win a pre-creation race or redirect the open.

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关键资源的不正确权限授予

EGOR Data::Deque::Shared 后置链接漏洞

EGOR Data::Deque::Shared是EGOR个人开发者的一个共享数据队列的Perl模块。 EGOR Data::Deque::Shared 0.06之前版本存在安全漏洞，该漏洞源于创建全局可读的mmap备份文件且未使用O_EXCL或O_NOFOLLOW标志打开，可能导致本地用户读取IPC有效载荷，并允许本地攻击者利用预先植入的文件或符号链接赢得预创建竞争条件或重定向打开操作。

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