Is CVE-2026-2100 in the CISA KEV catalog?

No. CVE-2026-2100 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-2100?

CVE-2026-2100 has a CVSS v3 base score of 5.3 (Moderate).

What is the EPSS score for CVE-2026-2100?

CVE-2026-2100 has an EPSS score of 1.13% (62th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-2100?

Upgrade p11-kit on debian unstable to 0.26.2-2 or later. Fixes are available for 33 affected products.

CVE & CISA-KEV Catalog

CVE-2026-2100

MEDIUM

5.3

CVSS v3

NVD

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.

CWE-824

How to fix

Remediation Available

p11-kitDebian

Fixed in:0.26.2-2CVE-2026-2100

p11-kitRed Hat / RHEL

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kitRocky

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-clientRocky

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-clientRed Hat / RHEL

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-client-debuginfoRocky

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-client-debuginfoRed Hat / RHEL

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-debuginfoRed Hat / RHEL

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-debuginfoRocky

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-debugsourceRed Hat / RHEL

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-debugsourceRocky

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-develRocky

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-develRed Hat / RHEL

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-serverRed Hat / RHEL

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-serverRocky

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-server-debuginfoRocky

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-server-debuginfoRed Hat / RHEL

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-trustRocky

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-trustRed Hat / RHEL

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-trust-debuginfoRocky

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

p11-kit-trust-debuginfoRed Hat / RHEL

Fixed in:0:0.26.2-1.el10RHSA-2026:18143

Fixed in:0:0.26.2-1.el9RHSA-2026:18599

registry.redhat.io/costmanagement/costmanagement-metricsRocky

Fixed in:rhel9-operator@sha256:40f9729022eb27cefd14f7d0e0d869b936e5862cb079009de45cf7b3626a4275_s390xRHSA-2026:27998

Fixed in:rhel9-operator@sha256:92da8c11452f7ae0f24e70d453f03d31e7a10ac1276c5bdc63539952d2c87b23_amd64RHSA-2026:27998

Fixed in:operator-bundle@sha256:c2c4a771905d23d7c0aad05672e5d8491c744ccb7f7192ef31e2b93f82a1f3b4_amd64RHSA-2026:27998

Fixed in:rhel9-operator@sha256:62c2477e0d9ceb1998eb0d1b496ee6e46b83433ff901909aa749d6dacfaf23cc_arm64RHSA-2026:27998

Fixed in:rhel9-operator@sha256:e694c9b65667f1989df1a4c7028defd9b42f099046d55807bfef3d766ba65335_ppc64leRHSA-2026:27998

registry.redhat.io/costmanagement/costmanagement-metricsRed Hat / RHEL

Fixed in:rhel9-operator@sha256:92da8c11452f7ae0f24e70d453f03d31e7a10ac1276c5bdc63539952d2c87b23_amd64RHSA-2026:27998

Fixed in:operator-bundle@sha256:c2c4a771905d23d7c0aad05672e5d8491c744ccb7f7192ef31e2b93f82a1f3b4_amd64RHSA-2026:27998

Fixed in:rhel9-operator@sha256:62c2477e0d9ceb1998eb0d1b496ee6e46b83433ff901909aa749d6dacfaf23cc_arm64RHSA-2026:27998

Fixed in:rhel9-operator@sha256:e694c9b65667f1989df1a4c7028defd9b42f099046d55807bfef3d766ba65335_ppc64leRHSA-2026:27998

Fixed in:rhel9-operator@sha256:40f9729022eb27cefd14f7d0e0d869b936e5862cb079009de45cf7b3626a4275_s390xRHSA-2026:27998

registry.redhat.io/insights-proxy/insights-proxyRed Hat / RHEL

Fixed in:container-rhel9@sha256:35a26e08219c8608fd6be94ab0e16947c6d8dd68752b7c7747b65f23f1679492_amd64RHSA-2026:22634

Fixed in:container-rhel9@sha256:97b534defdc32202c8208b1ab1411a1e1085accaa79372437d467968fae0ba53_arm64RHSA-2026:22634

registry.redhat.io/insights-proxy/insights-proxyRocky

Fixed in:container-rhel9@sha256:97b534defdc32202c8208b1ab1411a1e1085accaa79372437d467968fae0ba53_arm64RHSA-2026:22634

Fixed in:container-rhel9@sha256:35a26e08219c8608fd6be94ab0e16947c6d8dd68752b7c7747b65f23f1679492_amd64RHSA-2026:22634

registry.redhat.io/rhui5/cdsRed Hat / RHEL

Fixed in:rhel9@sha256:29229a9b1908d9586aa60ae96ea4cab29316c058665ea4e10bd7d88e3434f38a_amd64RHSA-2026:21275

registry.redhat.io/rhui5/cdsRocky

Fixed in:rhel9@sha256:29229a9b1908d9586aa60ae96ea4cab29316c058665ea4e10bd7d88e3434f38a_amd64RHSA-2026:21275

registry.redhat.io/rhui5/haproxyRocky

Fixed in:rhel9@sha256:eeceb83a297bdb2778a63fa0e55d441ba316b77be786280746348fdcdeae866d_amd64RHSA-2026:21275

registry.redhat.io/rhui5/haproxyRed Hat / RHEL

Fixed in:rhel9@sha256:eeceb83a297bdb2778a63fa0e55d441ba316b77be786280746348fdcdeae866d_amd64RHSA-2026:21275

registry.redhat.io/rhui5/installerRocky

Fixed in:rhel9@sha256:fb8d5c681efa515095f164334fde48bb2c4160069ba7512ddbf16a865c65ae17_amd64RHSA-2026:21275

registry.redhat.io/rhui5/installerRed Hat / RHEL

Fixed in:rhel9@sha256:fb8d5c681efa515095f164334fde48bb2c4160069ba7512ddbf16a865c65ae17_amd64RHSA-2026:21275

registry.redhat.io/rhui5/rhuaRocky

Fixed in:rhel9@sha256:ae3724c290b6e0c536cadae4dbe38fc1241fb88520db381e04bfbd1e489989e8_amd64RHSA-2026:21275

registry.redhat.io/rhui5/rhuaRed Hat / RHEL

Fixed in:rhel9@sha256:ae3724c290b6e0c536cadae4dbe38fc1241fb88520db381e04bfbd1e489989e8_amd64RHSA-2026:21275

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploit Intelligence

1.13%probability of exploitation in 30 days

62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Patch1

github.com

Vendor Advisory2

Other references6

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-22.