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CVE-2026-80709

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs There is a wrong upper limit check for the domain value when a…

Published Aug 28, 2026EPSS 0.18%

Overview

CVE-2026-80709 is a high-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs

There is a wrong upper limit check for the domain value when an EP11

CPRB is processed for sending to a crypto card. This check is only

active on custom device nodes but may lead to access heap memory

behind perms->adm when an administrative CPRB is sent.

Add correct limit (AP_DOMAINS = 256) checking to fix this.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1223477ca88e2396eca440919d0ca8754df79bd5Refgit.kernel.org/stable/c/13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15Refgit.kernel.org/stable/c/4589f742718d0256ea6dd1f5a78be6e689bdb8aaRefgit.kernel.org/stable/c/672b12940e3f1336dfed5287412a71500adf2a76Refgit.kernel.org/stable/c/983279d7f86ade73db86f886e09172dd567031b5Refgit.kernel.org/stable/c/b505dcc8307d64468b463dfad45a03bf865c637e

How CyberStrike helps

Frequently asked questions

What is CVE-2026-80709?

CVE-2026-80709 is a high-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-80709?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-80709?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-80709?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80709 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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