CVE-2026-64616
Data::NDArray::Shared versions before 0.02 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW
Description
Data::NDArray::Shared versions before 0.02 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW. The segment is created in ndarray.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.
INFO
Published Date :
July 21, 2026, 8:17 p.m.
Last Modified :
July 21, 2026, 8:17 p.m.
Remotely Exploit :
No
Source :
9b29abf9-4ab0-4765-b253-1875cd9b441e
Affected Products
The following products are affected by CVE-2026-64616
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update Data::NDArray::Shared to a version after 0.02.
- Ensure files are created with restrictive permissions.
- Avoid following symbolic links.
- Use exclusive file creation flags.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64616.
| URL | Resource |
|---|---|
| https://metacpan.org/release/EGOR/Data-NDArray-Shared-0.02/changes | |
| https://metacpan.org/release/EGOR/Data-NDArray-Shared-0.02/diff/EGOR/Data-NDArray-Shared-0.01#ndarray.h |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64616 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64616
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64616 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64616 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 9b29abf9-4ab0-4765-b253-1875cd9b441e
Jul. 21, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/vividsnow/perl5-data-ndarray-shared', 'vendor': 'EGOR', 'product': 'Data::NDArray::Shared', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.02', 'versionType': 'custom'}], 'packageName': 'Data-NDArray-Shared', 'programFiles': ['ndarray.h'], 'collectionURL': 'https://cpan.org/modules', 'defaultStatus': 'unaffected'}] Added Description Data::NDArray::Shared versions before 0.02 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW. The segment is created in ndarray.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. Added CWE CWE-59 Added CWE CWE-732 Added Reference https://metacpan.org/release/EGOR/Data-NDArray-Shared-0.02/changes Added Reference https://metacpan.org/release/EGOR/Data-NDArray-Shared-0.02/diff/EGOR/Data-NDArray-Shared-0.01#ndarray.h