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CVE-2026-97589

7.0 · HIGH

In the Linux kernel, the following vulnerability has been resolved: s390/crypto: Fix wrong return code to engine in asynch callbacks When crypto_finalize_hash_request() or crypto_finalize_skciphe…

Published Sep 25, 2026EPSS 0.14%

Overview

CVE-2026-97589 is a high-severity vulnerability. It was published on September 25, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.0, 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/crypto: Fix wrong return code to engine in asynch callbacks

When crypto_finalize_hash_request() or

crypto_finalize_skcipher_request() explicitly completes a request, the

do_one_request callback must return 0 to indicate successful

handling. Returning a negative error code causes the crypto engine to

assume the driver failed to take ownership and triggers a second

completion via crypto_request_complete(), resulting in a double

completion. This pattern occurs in paes_s390.c 4 times and once in

phmac_s390.c.

Fixed in phmac_do_one_request() and all four paes do_one_request

callbacks (ecb, cbc, ctr, xts) by returning 0 after explicit

finalization instead of propagating the error code.

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/5480291aa848e19e61175abfd457933516db70c6Refgit.kernel.org/stable/c/972e0d9b7d1d112240ccde1f1be85bf9ffaa1720Refgit.kernel.org/stable/c/ac1481320110b803ab9b79ab4d2ca11a74fc05f2

How CyberStrike helps

Frequently asked questions

What is CVE-2026-97589?

CVE-2026-97589 is a high-severity vulnerability. It was published on September 25, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).

How severe is CVE-2026-97589?

This vulnerability has a CVSS 3.1 base score of 7.0, 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-2026-97589?

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-2026-97589?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-97589 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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