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Vulnerability · Published Mar 26, 2026 · Assigned by redhat

CVE-2026-2100P11-kit: null dereference via c_derivekey with specific null parameters

Medium 5.3

In plain English

A medium-severity security flaw in p11-kit from p11-glue. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)1.3%top 29.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10p11-kit0.26.2-1.el10ALSA-2026:18143
AlmaLinux:9p11-kit0.26.2-1.el9ALSA-2026:18599
AlmaLinux:10p11-kit-client0.26.2-1.el10ALSA-2026:18143
AlmaLinux:9p11-kit-client0.26.2-1.el9ALSA-2026:18599
AlmaLinux:10p11-kit-devel0.26.2-1.el10ALSA-2026:18143
AlmaLinux:9p11-kit-devel0.26.2-1.el9ALSA-2026:18599
AlmaLinux:10p11-kit-server0.26.2-1.el10ALSA-2026:18143
AlmaLinux:9p11-kit-server0.26.2-1.el9ALSA-2026:18599
AlmaLinux:10p11-kit-trust0.26.2-1.el10ALSA-2026:18143
AlmaLinux:9p11-kit-trust0.26.2-1.el9ALSA-2026:18599
Alpine:v3.21p11-kit0.26.2-r0ALPINE-CVE-2026-2100
Alpine:v3.22p11-kit0.26.2-r0ALPINE-CVE-2026-2100
Alpine:v3.23p11-kit0.26.2-r0ALPINE-CVE-2026-2100
Alpine:v3.24p11-kit0.26.2-r0ALPINE-CVE-2026-2100
Debian:14p11-kit0.26.2-2DEBIAN-CVE-2026-2100
Rocky Linux:10p11-kit0:0.26.2-1.el10RLSA-2026:18143
Rocky Linux:9p11-kit0:0.26.2-1.el9RLSA-2026:18599
Ubuntu:22.04:LTSp11-kitno fix listedUBUNTU-CVE-2026-2100
Ubuntu:24.04:LTSp11-kitno fix listedUBUNTU-CVE-2026-2100
Ubuntu:25.10p11-kitno fix listedUBUNTU-CVE-2026-2100

Affected products (as reported)

VendorProductVersions
p11-glue p11-kit 0 – before 0.26.2
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.20 see references
Red Hat Cost Management 4 see references
Red Hat Red Hat Hardened Images see references
Red Hat Red Hat Insights proxy 1.5 see references
Red Hat Red Hat Update Infrastructure 5 see references
Red Hat Red Hat Update Infrastructure 5 see references
Red Hat Red Hat Update Infrastructure 5 see references
Red Hat Red Hat Update Infrastructure 5 see references
Red Hat Red Hat Update Infrastructure 5 see references
Red Hat Red Hat Update Infrastructure 5 see references
Red Hat Red Hat Update Infrastructure 5 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references

Weakness: CWE-824 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References