CVE-2026-64616 EGOR CVE debrief

Who should care

Users of Data::NDArray::Shared versions before 0.02 for Perl should be aware of this vulnerability, as it allows local attackers to access IPC payloads stored in the world-readable segment. Operators, platform administrators, vulnerability management teams, and security teams should review the affected scope and severity with the vendor and plan for remediation.

Technical summary

The Data::NDArray::Shared module for Perl creates a shared memory segment with world-readable permissions. The mmap backing file is created with open(path, O_RDWR|O_CREAT, 0666), which results in a file with mode 0644 (world-readable) under the default umask 022. The open call lacks O_EXCL and O_NOFOLLOW flags, making it vulnerable to symlink attacks and allowing a pre-planted file to be used instead of failing.

Defensive priority

High

Recommended defensive actions

• Update to version 0.02 or later of Data::NDArray::Shared
• Use O_EXCL and O_NOFOLLOW flags when opening the mmap backing file
• Restrict access to the shared memory segment
• Monitor for suspicious activity around shared memory segments
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-21T20:17:04.290Z and has not been modified since then. The NVD entry is currently Deferred. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the vendor. The vulnerability affects Data::NDArray::Shared versions before 0.02 for Perl.

Official resources