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CVE-2026-90383

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: misc: sgi-gru: remove interrupt-context page-table walks The GRU TLB miss handler walks a process's page tables without holding…

Published Sep 17, 2026EPSS 0.16%

Overview

CVE-2026-90383 is a high-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

misc: sgi-gru: remove interrupt-context page-table walks

The GRU TLB miss handler walks a process's page tables without holding

page-table locks or a reference to the mapped page. It also uses a kernel

page-table accessor on user page tables and supports only PMD-level large

mappings on x86-64.

Remove the direct walker. Send interrupt faults directly to user polling

mode so the existing call-OS fallback retries them in process context.

Remove the mmap-lock failure statistic that can no longer be incremented.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0ca505b973aa1a5e3fcca7bd04774e794ff5e662Refgit.kernel.org/stable/c/5a540ced720b4397306337cab34af1af4b30827cRefgit.kernel.org/stable/c/6248eb1833ff0adfdbbadd5f846c2f22e02a01b0Refgit.kernel.org/stable/c/877423f595b60f8fe7c18b64a5d283d9e1732a13Refgit.kernel.org/stable/c/928a8e9f523df845fc496bcb9811013b67aabec5Refgit.kernel.org/stable/c/ef81e4a1628ecfb9cfc442de10883f383faf17a1

How CyberStrike helps

Frequently asked questions

What is CVE-2026-90383?

CVE-2026-90383 is a high-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-90383?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-90383?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-90383?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-90383 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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