Vulnerability 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.
CVSS Score
HIGH
References
- https://git.kernel.org/stable/c/02028a24e26d85262ab9c8fc4344e1f3503007fc
- https://git.kernel.org/stable/c/1ac287e2af9a9112fe271427ef45eceb26bce8b4
- https://git.kernel.org/stable/c/433e5e70cdc1edf382d28d08a885b22e2b98b7da
- https://git.kernel.org/stable/c/614aa0491c7a190556c2345dddee0b6f5ed90989
FAQ
What is CVE-2026-64558?
CVE-2026-64558 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 im...
How severe is CVE-2026-64558?
CVE-2026-64558 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-64558?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.