Vulnerability Description
Data::DisjointSet::Shared versions before 0.02 for Perl allow out-of-bounds reads and writes via an unvalidated parent index in dsu_find. The attach-time validator dsu_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. dsu_find walks and path-compresses parent[x] with x a raw file-stored index never bounded against the node count, so both the read and the compression write-back land out of bounds. A local peer that can write the backing file can leave the header valid while poisoning the parent array, so the next find or union both reads and writes through an out-of-bounds parent index, corrupting memory or crashing the process.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://metacpan.org/release/EGOR/Data-DisjointSet-Shared-0.02/changes
- https://metacpan.org/release/EGOR/Data-DisjointSet-Shared-0.02/diff/EGOR/Data-Di
FAQ
What is CVE-2026-59147?
CVE-2026-59147 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Data::DisjointSet::Shared versions before 0.02 for Perl allow out-of-bounds reads and writes via an unvalidated parent index in dsu_find. The attach-time validator dsu_validate_header checks the head...
How severe is CVE-2026-59147?
CVE-2026-59147 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-59147?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.