CVE-2026-2100: Uninitialized Return in p11-kit C_DeriveKey DS
CVE-2026-2100 Published on March 26, 2026

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

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Vulnerability Analysis

CVE-2026-2100 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a small impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
LOW

Timeline

Reported to Red Hat.

Made public.

Weakness Type

Access of Uninitialized Pointer

The program accesses or uses a pointer that has not been initialized.


Products Associated with CVE-2026-2100

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Red Hat Enterprise Linux (RHEL)
 
Red Hat Openshift
 
Red Hat Hummingbird
 
Red Hat Rhui
 
Red Hat Insights Proxy
 
Red Hat Cost Management
 

Affected Versions

Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Cost Management 4: Red Hat Hardened Images: Red Hat Insights proxy 1.5: Red Hat Update Infrastructure 5: Red Hat Update Infrastructure 5: Red Hat Update Infrastructure 5: Red Hat Update Infrastructure 5: Red Hat Enterprise Linux 6: Red Hat Enterprise Linux 7: Red Hat Enterprise Linux 8: Red Hat OpenShift Container Platform 4:

Exploit Probability

EPSS
1.02%
Percentile
58.87%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.