CVE-2026-64613: Data::Buffer::Shared 0 to before 0.05

Affected technology

Data::Buffer::Shared · 0 to before 0.05
EGOR

Description’s affected range: versions before 0.05 for Perl create a world-readable mmap backing file and open it without O_NOFOLLOW

Component: Not specified by the source
File: buf_generic.h

Attack conditions (Source advisory, CVSS 3.1): Local · No privileges required · No user interaction required

What an attacker can do

Where any local user can read the IPC payloads stored in the world-readable segment, and a pre-planted symlink at the path redirects the open to another file. Source advisory’s CVSS 3.1 assessment (base score 6.2/10) rates confidentiality impact as high; integrity and availability impact as none.