# CVE-2017-20230: perl: Storable versions before 3.05 for Perl has a stack overflow

CVE-2017-20230 is fixed in perl on 1 platform, first by DEBIAN-CVE-2017-20230, released May 15, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2017-20230
- Priority: Urgent
- CVSS: 10.0 (critical)
- EPSS: 0.0064
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 21, 2026

## Description

Storable versions before 3.05 for Perl has a stack overflow.  The retrieve_hook function stored the length of the class name into a signed integer but in read operations treated the length as unsigned. This allowed an attacker to craft data that could trigger the overflow.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | perl Debian 12.15 (bookworm) | 5.28.0-3 | [DEBIAN-CVE-2017-20230](https://patchblox.com/security/data/fix/linux/debian-cve-2017-20230.md) | May 15, 2026 |
| Linux | perl Debian 13.5 (trixie) | 5.28.0-3 | [DEBIAN-CVE-2017-20230](https://patchblox.com/security/data/fix/linux/debian-cve-2017-20230.md) | May 15, 2026 |
| Linux | perl Debian 14 | 5.28.0-3 | [DEBIAN-CVE-2017-20230](https://patchblox.com/security/data/fix/linux/debian-cve-2017-20230.md) | May 15, 2026 |

---

Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.