CVE-2026-64559

HIGHCVSS 7.8/10

Last modified

CVE-2026-64559 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_VERIFYPROTK ioctl Explicitly check the buffer length request structure provided by user-space and fail, if it exceeds the buffer size..

Description

In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Check length in PKEY_VERIFYPROTK ioctl Explicitly check the buffer length request structure provided by user-space and fail, if it exceeds the buffer size.

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, < 0a9e34ccbe772b8f321388cdbdf4f22b94e513e7; >= 8fcc231ce3bea12b78bb94b280cdc03cff342435, < 693bf91d4db134f9b1c2840c8e287eee3d993bac; >= 8fcc231ce3bea12b78bb94b280cdc03cff342435, < 7e7e03848c918aa0acad5ffd75d929e3afec1554; >= 8fcc231ce3bea12b78bb94b280cdc03cff342435, < b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970
LinuxLinux6.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-64559?
In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Check length in PKEY_VERIFYPROTK ioctl Explicitly check the buffer length request structure provided by user-space and fail, if it exceeds the buffer size.
How severe is CVE-2026-64559?
CVE-2026-64559 has a CVSS score of 7.8/10 (HIGH severity).
How do I fix CVE-2026-64559?
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