CVE-2026-64558

HIGHCVSS 7.8/10

Last modified

CVE-2026-64558 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Check length in pkey_pckmo handler implementation Explicitly check the length of the target buffer in the pkey_pckmo implementation of the key_to_protkey() handler function. The handler function fails, if the generated output data exceeds the length of the provided target buffer..

Description

In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Check length in pkey_pckmo handler implementation Explicitly check the length of the target buffer in the pkey_pckmo implementation of the key_to_protkey() handler function. The handler function fails, if the generated output data exceeds the length of the provided target buffer.

Metrics

CVSS 3.1
7.8/10

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

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 8fcc231ce3bea12b78bb94b280cdc03cff342435, < 02028a24e26d85262ab9c8fc4344e1f3503007fc; >= 8fcc231ce3bea12b78bb94b280cdc03cff342435, < 433e5e70cdc1edf382d28d08a885b22e2b98b7da; >= 8fcc231ce3bea12b78bb94b280cdc03cff342435, < 614aa0491c7a190556c2345dddee0b6f5ed90989; >= 8fcc231ce3bea12b78bb94b280cdc03cff342435, < 1ac287e2af9a9112fe271427ef45eceb26bce8b4
LinuxLinux6.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-64558?
In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Check length in pkey_pckmo handler implementation Explicitly check the length of the target buffer in the pkey_pckmo implementation of the key_to_protkey() handler function. The handler function fails, if the generated output data exceeds the length of the provided target buffer.
How severe is CVE-2026-64558?
CVE-2026-64558 has a CVSS score of 7.8/10 (HIGH severity).
How do I fix CVE-2026-64558?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST