# CVE-2026-2100

## Summary

- **CVE ID:** CVE-2026-2100
- **Severity:** MEDIUM
- **CVSS Score:** 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
- **CWE:** CWE-824
- **Published:** Mar 26, 2026
- **Last Modified:** Sep 14, 2026

## Description

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.

## Affected Products

- Red Hat — Red Hat Hardened Images (0.26.2-1.1.hum1)
- Red Hat — Red Hat Enterprise Linux 10 (0:0.26.2-1.el10)
- Red Hat — Red Hat Enterprise Linux 9 (0:0.26.2-1.el9)
- Red Hat — Red Hat Update Infrastructure 5 (1779798159)
- Red Hat — Red Hat Update Infrastructure 5 (1779798164)
- Red Hat — Red Hat Update Infrastructure 5 (1779798165)
- Red Hat — Red Hat Update Infrastructure 5 (1779798222)
- Red Hat — Red Hat Insights proxy 1.5 (1780420428)
- Red Hat — Cost Management 4 (1780946239)
- p11-glue — p11-kit (0)
- Red Hat — Cost Management Metrics Operator 4 (1780946239)
- Red Hat — Red Hat Update Infrastructure 5 (1787241211)
- Red Hat — Red Hat Update Infrastructure 5 (1787135742)
- Red Hat — Red Hat Update Infrastructure 5 (1787241260)

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-2100)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2437308)
- [CNA](https://github.com/p11-glue/p11-kit/pull/740)
- [CNA](https://access.redhat.com/errata/RHSA-2026:7065)
- [CNA](https://access.redhat.com/errata/RHSA-2026:18143)
- [CNA](https://access.redhat.com/errata/RHSA-2026:18599)
- [CNA](https://access.redhat.com/errata/RHSA-2026:21275)
- [CNA](https://access.redhat.com/errata/RHSA-2026:22634)
- [CNA](https://access.redhat.com/errata/RHSA-2026:27998)
- [CNA](https://github.com/p11-glue/p11-kit/releases/tag/0.26.2)
- [CNA](https://access.redhat.com/errata/RHSA-2026:58981)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.16%
- **EPSS Percentile:** 65.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._