CPANSA-Data-DisjointSet-Shared-2026-59147: Data-DisjointSet-Shared vulnerability
| Publisher | giterlizzi | Document category | csaf_security_advisory |
|---|---|---|---|
| Initial release date | 2026-07-21T00:00:00 | Engine | CSAF Perl Toolkit 0.26 |
| Current release date | 2026-07-21T00:00:00 | Build Date | |
| Current version | 1 | Status | final |
| CVSS v3.1 Base Score | 9.8 | Severity | Critical |
| Original language | Language | en | |
| Also referred to | |||
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.
Vulnerabilities
CVE-2026-59147
Vulnerability DescriptionData::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.
| Weakness | CWE-125 : Out-of-bounds Read |
|---|
Product status
Known affected
| Product | Score | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Data-DisjointSet-Shared less than 0.02 |
|
Fixed
- Data-DisjointSet-Shared greater than or equal 0.02
giterlizzi
Namespace: https://github.com/giterlizzi/
gdt@cpan.org
References
- CPANSA-Data-DisjointSet-Shared-2026-59147 JSON self
https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-data-disjointset-shared-2026-59147.json - https://metacpan.org/release/EGOR/Data-DisjointSet-Shared-0.02/changes external
https://metacpan.org/release/EGOR/Data-DisjointSet-Shared-0.02/changes - https://metacpan.org/release/EGOR/Data-DisjointSet-Shared-0.02/diff/EGOR/Data-DisjointSet-Shared-0.01#dsu.h external
https://metacpan.org/release/EGOR/Data-DisjointSet-Shared-0.02/diff/EGOR/Data-DisjointSet-Shared-0.01#dsu.h - CVE-2026-59147 (NVD) external
https://nvd.nist.gov/vuln/detail/CVE-2026-59147
Revision history
| Version | Date of the revision | Summary of the revision |
|---|---|---|
| 1 | Tue Jul 21 00:00:00 2026 | First release |
Sharing rules
TLP:WHITE
For the TLP version see: https://www.first.org/tlp/