CVE-2026-2100
No exploitation reported by the sources we read.
- Published2026-03-26
- WeaknessCWE-824
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2026-03-2621:17CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-2100?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-2100?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 9.0 | = 9.0 | no fix published | NVD |
| 10.0 | = 10.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | all versions | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | all versions | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- p11-kitAlmaLinux:10all versions · fixed in 0.26.2-1.el10and 4 other packages
- p11-kitAlmaLinux:9all versions · fixed in 0.26.2-1.el9and 4 other packages
Vendor advisories
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: Red Hat Update Infrastructure 5.3 Technology Preview security update
Red Hat Security Advisory: Cost Management Metrics Operator Update
Red Hat Security Advisory: Insights proxy Container Image
Fix
- Vendor fix Red Hat Product Security RHSA-2026:82888 · 1 productBefore applying this update, make sure all previously released errata relevant to your system have been applied. The steps to apply the upgraded images are different depending on the installation plan approval policy you used when installing the cert-manager Operator for Red Hat OpenShift. - If t…
- Vendor fix Red Hat Product Security RHSA-2026:58981 · 3 productsPlease consult the RHUI Technology Preview Release Notes at https://access.redhat.com/articles/7141172 for instructions on how to use this image set.
- Vendor fix Red Hat Product Security RHSA-2026:27998 · 4 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://docs.openshift.com/container-platform/latest/operators/admin/olm-upgrading-operators.html
- Vendor fix Red Hat Product Security RHSA-2026:22634 · 2 productsThe Insights proxy container image provided here is downloaded by the Red Hat Insights proxy product RPM. Before applying this update, make sure all previously released errata relevant to your system have been applied.
- Workaround from the vendor Red Hat Product Security RHSA-2026:82888 · 1 productMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Advisories and patches
- access.redhat.comVendor Advisory
- bugzilla.redhat.comVendor Advisory
- github.comPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2026-03-26
- Last Modified
- 2026-10-14
- NVD status
- Undergoing Analysis
Frequently asked questions
What is CVE-2026-2100?
Is CVE-2026-2100 actively exploited?
What is the CVSS score for CVE-2026-2100?
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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.
- CVE-2026-13757same product
- CVE-2025-15467same advisory
- CVE-2026-42055same advisory
- CVE-2025-11187same advisory
- CVE-2026-45447same advisoryHeap Use-After-Free in the PKCS7_verify() Function
- CVE-2026-42945same advisory
- CVE-2026-9256same advisoryNGINX ngx_http_rewrite_module vulnerability
- CVE-2024-34459same advisorylibxml2: buffer over-read in xmlHTMLPrintFileContext in xmllint.c