What is CVE-2026-97591?

CVE-2026-97591 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.17 onward and patched in 6.18.53, 7.2.7 and 7.3-rc3. CVE-2026-97591 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-97591?

CVE-2026-97591 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-97591?

Yes, CVE-2026-97591 has been patched. Fixed versions include 6.18.53, 7.2.7 and 7.3-rc3. If you are running Linux kernel 6.17 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-97591 actively exploited?

CVE-2026-97591 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-97591

In the Linux kernel, the following vulnerability has been resolved: s390/crypto: Fix handling of EBUSY in PHMAC when req is pushed to crypto engine When a request is transferred to the engine via crypto_transfer_hash_request_to_engine() there are two return codes signaling a successful transfer: EINPROGRESS and EBUSY. However the correct handling of EBUSY was missing and has been added as a return code indicating a successful transfer to the crypto engine.

Package Linux Kernel

Published 2026-09-25

Last modified 2026-09-25

Patch available

Yes

Affected versions

Linux kernel versions 6.17 and later are affected. Fixed in 6.18.53, 7.2.7, 7.3-rc3 and their respective stable series.

Affected from

≥ 6.17

Fixed in

✓ 6.18.53 6.18.x ✓ 7.2.7 7.2.x ✓ 7.3-rc3

References

3 total

Frequently asked questions

What is CVE-2026-97591?

CVE-2026-97591 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.17 onward and has been patched in 6.18.53, 7.2.7 and 7.3-rc3. CVE-2026-97591 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-97591?

Yes. CVE-2026-97591 has been patched. Fixed versions include 6.18.53, 7.2.7 and 7.3-rc3. If you are running Linux kernel 6.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-97591 actively exploited?

No. CVE-2026-97591 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.