CVE-2026-65065

MediumCVSS 5.5

Published: 21/07/2026(UTC)Updated: 24/07/2026(UTC)Translated: 25/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.12%

2th percentile - higher than 2% of all known CVEs

Summary

The Data::RoaringBitmap::Shared library for Perl before version 0.02 creates a world-readable mmap backing file (mode 0666) and opens it without O_EXCL or O_NOFOLLOW. This allows a local attacker to read IPC data and replace the file via a symlink.

Risk Assessment

The organization risks IPC data leakage between processes and symlink race attacks that could lead to hijacking or modification of shared data.

Recommendation

Update the Data::RoaringBitmap::Shared library to version 0.02 or later, which uses safer file permissions and open flags.

Other vulnerabilities in Data::RoaringBitmap::Shared

CVE-2026-59143Medium
Vulnerability in Data::RoaringBitmap::Shared for Perl before version 0.02 allows an out-of-bounds read via an unvalidated container offset and cardinality in rb_contains_locked. The rb_validate_header validator only checks the header and region layout, not the bucket contents, enabling a local attacker with write access to the backing file to poison a bucket and dereference a wild pointer.

Original NVD description (English source)

Data::RoaringBitmap::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 roaring.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