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CVE-2026-107794— ExtUtils::Typemaps::STL::List versions before 1.07 for Perl allocate a 32 GiB array on an empty list

Quick assessment

Affected
CVE-2026-107794
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Perl 模块 ExtUtils::Typemaps::STL::List 在 1.07 版本之前，当处理空列表时会分配一个 32 GiB 的数组。 其 OUTPUT 类型映射（typemaps）调用了 av_extend(av, len-1)。在空列表的情况下，len-1 会导致整数下溢（underflow），从而使 av_extend 分配一个包含 2^32 个槽位的数组，最终导致内存耗尽。 注意：ExtUtils::Typemaps::STL::Vector 模块在 1.05 版本中已修复了类似的问题。

AI Predicted 5.3 Difficulty: Easy

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
None None < 1.07 affected

I. Basic Information for CVE-2026-107794

Vulnerability Information
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Vulnerability Title
ExtUtils::Typemaps::STL::List versions before 1.07 for Perl allocate a 32 GiB array on an empty list
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 0 ~ 1.07 -

II. Public POCs for CVE-2026-107794

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-107794

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Mailing List Discussions for CVE-2026-107794 (1)

News Coverage for CVE-2026-107794 (1)

Other References for CVE-2026-107794 (1)

IV. Related Vulnerabilities

Same weakness: CWE-191

V. Comments for CVE-2026-107794

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