Storable versions before 3.05 for Perl has a stack overflow

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.

Scores

EPSS (exploitation in 30 days)

0.64% · top 49% of all CVEs (4 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 10.0.

Weakness

• CWE-121 Stack-based Buffer Overflow (opens in a new tab)All about CWE-121 and its CVEs

Affected products

• NWCLARK · Storable

  • affected < 3.05

What to do

Solution: Upgrade to Storable version 3.05 or newer.

References (6)

• https://github.com/Perl/perl5/issues/15831 (opens in a new tab)issue-tracking
• https://github.com/Perl/perl5/commit/a258c17c6937f79529c8319a829310e09cdbd216.patch (opens in a new tab)patch
• https://metacpan.org/release/RURBAN/Storable-3.05/changes (opens in a new tab)release-notes
• https://www.nntp.perl.org/group/perl.perl5.porters/2017/01/msg242533.html (opens in a new tab)mailing-list
• https://www.nntp.perl.org/group/perl.perl5.porters/2017/01/msg242703.html (opens in a new tab)mailing-list
• http://www.openwall.com/lists/oss-security/2026/04/21/5 (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2017-20230](https://trackcve.app/badge/CVE-2017-20230.svg)](https://trackcve.app/cve/CVE-2017-20230)

Record last updated 21 Apr 2026, 18:22 UTC.