CVE-2026-2100

P11-kit: null dereference via c_derivekey with specific null parameters

State: Published
Severity: 5.3 Medium
Published: Mar 26, 2026
Updated: Oct 14, 2026
Reserved: Feb 6, 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.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	redhat

Weaknesses

CWE-824 Access of Uninitialized Pointer

Affected Products

Product	Versions
p11-kitp11-glue	before 0.26.2Affected
Red Hat Enterprise Linux 10Red Hat	0:0.26.2-1.el10 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:0.26.2-1.el9 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:0.26.2-1.el9 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.17Red Hat	1791371080 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.17Red Hat	1791371069 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.17Red Hat	1791788287 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.17Red Hat	1791970484 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1791459707 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1791459711 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1791459759 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1789029076 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1791966259 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.20Red Hat	1790598593 and laterNot affected
Cost Management 4Red Hat	1780946239 and laterNot affected
Red Hat Hardened ImagesRed Hat	0.26.2-1.1.hum1 and laterNot affected
Red Hat Insights proxy 1.5Red Hat	1780420428 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1779798159 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1779798164 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1779798165 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1779798222 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1787241211 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1787135742 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1787241260 and laterNot affected
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat Enterprise Linux 8Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat

References

RHSA-2026:18143vendor-advisory
RHSA-2026:18599vendor-advisory
RHSA-2026:21275vendor-advisory
RHSA-2026:22634vendor-advisory
RHSA-2026:27998vendor-advisory
RHSA-2026:58981vendor-advisory
RHSA-2026:7065vendor-advisory
RHSA-2026:72502vendor-advisory
RHSA-2026:82304vendor-advisory
RHSA-2026:82322vendor-advisory
RHSA-2026:82347vendor-advisory
RHSA-2026:82354vendor-advisory
RHSA-2026:82372vendor-advisory
RHSA-2026:82857vendor-advisory
RHSA-2026:82888vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-2100vdb-entry
RHBZ#2437308issue-tracking
https://github.com/p11-glue/p11-kit/pull/740
https://github.com/p11-glue/p11-kit/releases/tag/0.26.2

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