---
id: CVE-2026-17510
title: >-
  Crypt::OpenSSL::PKCS12 versions before 1.98 for Perl allow a NULL pointer
  dereference in print_attribute via a zero length BMPSTRING attribute.


  print_attribute() sizes the destination buffer for a BMPSTRING attribute from
  its declared b…
summary: >-
  Crypt::OpenSSL::PKCS12 versions before 1.98 for Perl allow a NULL pointer
  dereference in print_attribute via a zero length BMPSTRING attribute.


  print_attribute() sizes the destination buffer for a BMPSTRING attribute from
  its declared b…
severity: none
cwe:
  - CWE-476
published: '2026-08-09'
updated: '2026-08-09'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-17510'
references:
  - url: >-
      https://github.com/dsully/perl-crypt-openssl-pkcs12/commit/6cb282d8d8e8ded4859551cd2d3cfa7c6028ce48.patch
    label: 9b29abf9-4ab0-4765-b253-1875cd9b441e
  - url: >-
      https://metacpan.org/release/JONASBN/Crypt-OpenSSL-PKCS12-1.98/source/Changes.md
    label: 9b29abf9-4ab0-4765-b253-1875cd9b441e
  - url: 'http://www.openwall.com/lists/oss-security/2026/08/09/1'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
ingestedAt: '2026-08-09T07:33:01.698Z'
epss: 0.00609
epssPercentile: 0.47043
---

## Overview

Crypt::OpenSSL::PKCS12 versions before 1.98 for Perl allow a NULL pointer dereference in print_attribute via a zero length BMPSTRING attribute.

print_attribute() sizes the destination buffer for a BMPSTRING attribute from its declared byte length with `Renew(*attribute, length, char)`. A zero length attribute makes that a zero size reallocation, which Perl implements as a free returning NULL, so the buffer pointer becomes NULL, the following `strncpy` copies nothing, and the caller dereferences NULL in the `strlen()` it passes to `newSVpvn()`. A zero length BMPSTRING is even length, so the ASN.1 decoder accepts it and the value reaches this code. The UTF8STRING, OCTET STRING and BIT STRING arms size on `length + 1` or `length * 4 + 1` and are unaffected.

Any caller that passes an untrusted PKCS#12 file to info_as_hash() can crash the process. info() prints attribute values directly without sizing a buffer and is unaffected.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.