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CVE-2026-93079

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: cxl/features: Reject Get Feature count larger than the output buffer cxlctl_get_feature() sizes its output buffer from the user…

Published Sep 17, 2026EPSS 0.17%

Overview

CVE-2026-93079 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:

cxl/features: Reject Get Feature count larger than the output buffer

cxlctl_get_feature() sizes its output buffer from the user's

fwctl_rpc.out_len, but the device is told to write

cxl_mbox_get_feat_in.count bytes into rpc_out->payload, which is a

separate user-controlled value. Nothing bounds count against out_len, so

a small out_len with a large count overflows the kvzalloc()'d buffer.

A heap OOB write reachable from FWCTL_RPC.

Reject requests where count exceeds the available payload room, before

allocating.

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/329ea475581c647a680a6937e353c1a6e2534b40Refgit.kernel.org/stable/c/3f02031a0a53de0d3ef066c92d0486b2b11be40cRefgit.kernel.org/stable/c/4bf6bac375076ced2fa4b3fef8739bd985f93456

How CyberStrike helps

Frequently asked questions

What is CVE-2026-93079?

CVE-2026-93079 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-2026-93079?

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-2026-93079?

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-2026-93079?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-93079 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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