CVE-2026-2100
P11-kit: null dereference via c_derivekey with specific null parameters
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.
INFO
Published Date :
March 26, 2026, 9:17 p.m.
Last Modified :
April 25, 2026, 2:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-2100
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 53f830b8-0a3f-465b-8143-3b8a9948e749 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update p11-kit to the latest version.
- Apply any relevant security patches for p11-kit.
- Review application configurations for affected modules.
Public PoC/Exploit Available at Github
CVE-2026-2100 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-2100.
| URL | Resource |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:7065 | |
| https://access.redhat.com/security/cve/CVE-2026-2100 | Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2437308 | Issue Tracking Vendor Advisory |
| https://github.com/p11-glue/p11-kit/pull/740 | Issue Tracking Patch |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-2100 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-2100
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Community reconstruction of the legacy JSON NVD Data Feeds. This project uses and redistributes data from the NVD API but is neither endorsed nor certified by the NVD.
Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-2100 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-2100 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Apr. 25, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:7065 -
Initial Analysis by [email protected]
Apr. 21, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:* *cpe:2.3:a:p11-kit_project:p11-kit:-:*:*:*:*:*:*:* Added Reference Type Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-2100 Types: Vendor Advisory Added Reference Type Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2437308 Types: Issue Tracking, Vendor Advisory Added Reference Type Red Hat, Inc.: https://github.com/p11-glue/p11-kit/pull/740 Types: Issue Tracking, Patch -
CVE Modified by [email protected]
Mar. 26, 2026
Action Type Old Value New Value Added Reference https://github.com/p11-glue/p11-kit/pull/740 -
New CVE Received by [email protected]
Mar. 26, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Added CWE CWE-824 Added Reference https://access.redhat.com/security/cve/CVE-2026-2100 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2437308