---
id: CVE-2026-42015
title: A flaw was found in gnutls
summary: >-
  A flaw was found in gnutls. An off-by-one error exists in the PKCS#12 bag
  element bounds check. This vulnerability allows an remote attacker to write
  past the internal array of a PKCS#12 bag when appending to a bag that already
  contains …
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-193
published: '2026-05-26'
updated: '2026-06-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-42015'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:20611'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:20612'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:20613'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:26319'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:26409'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:29197'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:30004'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:30849'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:30850'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:32962'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-42015'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2467678'
    label: secalert@redhat.com
  - url: 'https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-11'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00727
epssPercentile: 0.52738
ingestedAt: '2026-06-29T13:42:11.962Z'
---

## Overview

A flaw was found in gnutls. An off-by-one error exists in the PKCS#12 bag element bounds check. This vulnerability allows an remote attacker to write past the internal array of a PKCS#12 bag when appending to a bag that already contains 32 elements. This memory corruption could lead to a denial of service (DoS) or potentially other unspecified impacts.

## Remediation

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