CVE-2026-64616
LowCVSS 3.3Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
Vulnerability in Data::NDArray::Shared for Perl before version 0.02. The mmap backing file is created with mode 0666, resulting in 0644 (world-readable) under default umask 022. Missing O_EXCL and O_NOFOLLOW flags allow a local attacker to follow a symlink or replace the file before creation.
Risk Assessment
A local user can read IPC data stored in the shared segment, leading to information disclosure. An attacker can also pre-plant the segment, potentially manipulating data.
Recommendation
Update Data::NDArray::Shared to version 0.02 or later. If not possible, restrict access to /tmp and /dev/shm directories for untrusted users.
Related vulnerabilities
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Vulnerabilities have been identified in the affected interface of ClearPass Policy Manager that could potentially allow an unauthenticated remote attacker to circumvent existing authentication controls. Successful exploitation could allow an attacker to gain unauthorized access to the affected system.
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- CVE-2026-76754Critical
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- CVE-2026-76753Critical
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- CVE-2026-76752Critical
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

