---
id: CVE-2026-2100
title: A flaw was found in p11-kit
summary: >-
  A flaw was found in p11-kit. A remote attacker could exploit this
  vulnerability by calling the C_DeriveKey function on a remote token with
  specific IBM kyber or IBM btc derive mechanism parameters set to NULL. This
  could lead to the RPC-…
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-824
published: '2026-03-26'
updated: '2026-06-22'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-2100'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:18143'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:18599'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:21275'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:22634'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:27998'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:7065'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-2100'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2437308'
    label: secalert@redhat.com
  - url: 'https://github.com/p11-glue/p11-kit/pull/740'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.0116
epssPercentile: 0.6582
ingestedAt: '2026-06-29T13:24:34.813Z'
---

## Overview

A flaw was found in p11-kit. A remote attacker could exploit this vulnerability by calling the C_DeriveKey function on a remote token with specific IBM kyber or IBM btc derive mechanism parameters set to NULL. This could lead to the RPC-client attempting to return an uninitialized value, potentially resulting in a NULL dereference or undefined behavior. This issue may cause an application level denial of service or other unpredictable system states.

## Remediation

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