CVE-2026-107794 PUBLISHED

ExtUtils::Typemaps::STL::List versions before 1.07 for Perl allocate a 32 GiB array on an empty list

Assigner: CPANSec
Reserved: 08.10.2026 Published: 10.10.2026 Updated: 10.10.2026

ExtUtils::Typemaps::STL::List versions before 1.07 for Perl allocate a 32 GiB array on an empty list.

The OUTPUT typemaps call av_extend( av, len-1 ). On an empty list, this undeflows, and av_extend will allocate an array with 2^32 slots, leading to memory exhaustion.

Note that a similar issue was fixed in ExtUtils::Typemaps::STL::Vector version 1.05.

Product Status

Package Collection https://cpan.org/modules
Package Name ExtUtils-Typemaps-Default
Versions Default: unaffected
  • affected from 0 to 1.07 (excl.)

Solutions

Upgrade to ExtUtils::Typemaps::Default version 1.07 or later.

Rebuild any modules that use ExtUtils::Typemaps::Default as part of their build process.

References

Problem Types

  • CWE-191 Integer Underflow (Wrap or Wraparound) CWE