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.
Affected products
nwclark: storable
References6
- github.com/Perl/perl5/commit/a258c17c6937f79529c8319a829310e09c… Patch
- github.com/Perl/perl5/issues/15831 Issue Tracking
- metacpan.org/release/RURBAN/Storable-3.05/changes Release Notes
- www.nntp.perl.org/group/perl.perl5.porters/2017/01/msg242533.ht… Third Party Advisory
- www.nntp.perl.org/group/perl.perl5.porters/2017/01/msg242703.ht… Third Party Advisory
- www.openwall.com/lists/oss-security/2026/04/21/5 Mailing List
Metrics
- CVSS 3.1
-
10.0
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 51 · as of 13 November 2026
- CWE
- CWE-121
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.