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CVE-2026-89733

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind() In uvc_function_bind() error path, we…

Published Sep 11, 2026EPSS 0.17%

Overview

CVE-2026-89733 is a high-severity vulnerability. It was published on September 11, 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:

usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind()

In uvc_function_bind() error path, we use usb_ep_free_request which

uses uvc->control_req but does not set it to NULL afterwards. Thus,

uvc->control_req is a dangling pointer causing a UAF. Also we do not set

the uvc->control_buf pointer to NULL after freeing it, which is another

dangling pointer. Fix it by setting uvc->control_req to NULL after we run

usb_ep_free_request() and uvc->control_buf to NULL after kfree. Do the

same for uvc_function_unbind().

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/38f822ddce9355893d734279a26ddec45182197eRefgit.kernel.org/stable/c/502a7f5b79b7ba751988789e982924f8f496129fRefgit.kernel.org/stable/c/85dd5e8bd6776d02854f2847d83429f1f712e99cRefgit.kernel.org/stable/c/8e88ed8a374de67270d38689f2a81018909cafbbRefgit.kernel.org/stable/c/9897b7da8c0ad8356c1b8649379fcb5a689462cbRefgit.kernel.org/stable/c/bdab5605259ba5d6ff927c1a85cc83eb3ecfdaccRefgit.kernel.org/stable/c/bec7708eb3b5295d12e931db24381b7c94c72953Refgit.kernel.org/stable/c/ddb1b0d5d858584ed0d3a5aaa042ee693998c7e2

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89733?

CVE-2026-89733 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-89733?

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-2026-89733?

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-2026-89733?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89733 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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