p11-kit: Access of Uninitialized Pointer
CVE-2026-2100 is a high-severity access of uninitialized pointer vulnerability in p11-kit from P11-glue, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 0.26.2 as the first without the flaw, so updating p11-kit to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.34% chance of exploitation within 30 days, higher than 72% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update p11-kit to 0.26.2 or a later version.
- Update Cert-manager Operator to 1.17.2 or 1.18.2 or 1.20.1, whichever matches your release line, or a later version.
- Update Cost Management Metrics Operator to 4.4.1 or a later version.
- Read the advisory on access.redhat.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| P11-glue | p11-kit | before 0.26.2 | 0.26.2 |
| Red Hat | Red Hat Enterprise Linux 10 | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 9 | Not specified in the record | Not stated |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | Not specified in the record | Not stated |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | Not specified in the record | Not stated |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.20 | Not specified in the record | Not stated |
| Red Hat | Cost Management 4 | Not specified in the record | Not stated |
| Red Hat | Red Hat Hardened Images | Not specified in the record | Not stated |
| Red Hat | Red Hat Insights proxy 1.5 | Not specified in the record | Not stated |
| Red Hat | Red Hat Update Infrastructure 5 | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 6 | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 7 | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 8 | Not specified in the record | Not stated |
| Red Hat | Red Hat OpenShift Container Platform 4 | Not specified in the record | Not stated |
| Red Hat | Cert-manager Operator | 1.17.0 up to, but not including, 1.17.2; 1.18.0 up to, but not including, 1.18.2; 1.20.0 up to, but not including, 1.20.1 | 1.17.2, 1.18.2, 1.20.1 |
| Red Hat | Cost Management Metrics Operator | 4.0.0 up to, but not including, 4.4.1 | 4.4.1 |
| Red Hat | Hardened Images | Not specified in the record | Not stated |
| Red Hat | Insights-proxy | 1.5.0 | Not stated |
| Red Hat | Update Infrastructure | 5.0 | Not stated |
| Red Hat | Enterprise Linux | 6.0; 7.0; 8.0; 9.0; 10.0 | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 5.3 | Medium | CNA (redhat.com) |
| CVSS 3.1 | 7.5 | High | NVD |
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.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Access of Uninitialized Pointer
The product accesses or uses a pointer that has not been initialized.
More Access of Uninitialized Pointer vulnerabilities (CWE-824)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
- access.redhat.com/errata/RHSA-2026:18143
- access.redhat.com/errata/RHSA-2026:18599
- access.redhat.com/errata/RHSA-2026:21275
- access.redhat.com/errata/RHSA-2026:22634
- access.redhat.com/errata/RHSA-2026:27998
- access.redhat.com/errata/RHSA-2026:58981
- access.redhat.com/errata/RHSA-2026:7065
- access.redhat.com/errata/RHSA-2026:72502
- access.redhat.com/errata/RHSA-2026:82304
- access.redhat.com/errata/RHSA-2026:82322
- access.redhat.com/errata/RHSA-2026:82347
- access.redhat.com/errata/RHSA-2026:82354
- access.redhat.com/errata/RHSA-2026:82372
- access.redhat.com/errata/RHSA-2026:82857
- access.redhat.com/errata/RHSA-2026:82888
Patches and release notes
- github.com/p11-glue/p11-kit/pull/740Issue Tracking
- github.com/p11-glue/p11-kit/releases/tag/0.26.2Product, Release Notes
Recent Access of Uninitialized Pointer vulnerabilities
- 9.8 Critical severity
- 7.8 High severity
- 7.8 High severity
- 9.8 Critical severity
- 7.8 High severity
- 7.5 High severity
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