---
id: CVE-2026-108518
title: >-
  DBI versions before 1.656 for Perl crash via type confusion in dbi_profile
  when a database handle is destroyed under a Profile Path with an {attr}
  element
summary: >-
  DBI versions before 1.656 for Perl crash via type confusion in dbi_profile
  when a database handle is destroyed under a Profile Path with an {attr}
  element.


  An {attr} element names a database handle attribute, which dbi_profile reads
  fro…
severity: none
cwe:
  - CWE-843
product: DBI
affected:
  - DBI < 1.656
published: '2026-10-20'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T00:17:16.110Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-108518'
references:
  - url: 'https://github.com/perl5-dbi/dbi/security/advisories/GHSA-7393-6f8r-fhh3'
  - url: >-
      https://github.com/perl5-dbi/dbi/commit/c2ff4df575d7af625bb4d0d1ef7539f90b22d8b2.patch
  - url: 'https://metacpan.org/release/HMBRAND/DBI-1.656/changes'
tags:
  - cve.org
ingestedAt: '2026-10-20T22:23:33.909Z'
---

## Overview

DBI versions before 1.656 for Perl crash via type confusion in dbi_profile when a database handle is destroyed under a Profile Path with an {attr} element.

An {attr} element names a database handle attribute, which dbi_profile reads from the handle's inner hash. It expects the inner handle as a reference and dereferences it, but a handle that is being destroyed hands back the inner hash itself, so the dereference yields the hash's bucket array. A type check on that pointer usually fails and the call goes unprofiled. When the memory it addresses passes the check, the attribute lookup dereferences a NULL or invalid pointer and the process dies on SIGSEGV.

The Path is set by the application, by the Profile handle attribute, or by the DBI_PROFILE environment variable, so `DBI_PROFILE={ImplementorClass}` can crash an unmodified program.

## Affected

- `DBI < 1.656`

## Remediation

Upgrade to DBI 1.656 or later.