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CVE-2026-90120

8.4 · HIGH

In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing In gic_acpi_parse_iaffid() a given MADT GICC entr…

Published Sep 17, 2026EPSS 0.20%

Overview

CVE-2026-90120 is a high-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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

irqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing

In gic_acpi_parse_iaffid() a given MADT GICC entry might not correspond

to a logical cpu recognized by the kernel, resulting in the cpu variable

initialization to an error value.

Currently, the get_logical_index() return value is not checked for failure,

which might result in out-of-bounds memory corruption while trying to

index a per_cpu variable array.

Add a check to evaluate get_logical_index() return value.

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/328affc639ce9873a7a0a3fd6b8339f19767529bRefgit.kernel.org/stable/c/6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69

How CyberStrike helps

Frequently asked questions

What is CVE-2026-90120?

CVE-2026-90120 is a high-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

How severe is CVE-2026-90120?

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-90120?

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-2026-90120?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-90120 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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