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.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 1% of CVEs (scores of 2026-10-25)

CWE

CWE-122

Published

2026-07-29

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

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

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