# CVE-2026-89733

## Summary

- **CVE ID:** CVE-2026-89733
- **Severity:** HIGH
- **CVSS Score:** 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 14, 2026

## 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().

## Affected Products

- Linux — Linux (0f9df939385527049c8062a099fbfa1479fe7ce0)
- Linux — Linux (1efa8a5aac93d9e67075995d7d4902b57ce184f7)
- Linux — Linux (e7a4b0efe62e56a0acc81d16091c6efc2a282be8)
- Linux — Linux (065f5561a20659cf17aae5f72b32b5c2695c8e00)
- Linux — Linux (3.2.36)
- Linux — Linux (3.4.25)
- Linux — Linux (3.7.2)
- Linux — Linux (3.8)
- Linux — Linux (0)
- Linux — Linux (6.12.109)
- Linux — Linux (6.18.50)
- Linux — Linux (7.2.4)
- Linux — Linux (7.3-rc1)
- Linux — Linux (5.10.270)
- Linux — Linux (5.15.221)
- Linux — Linux (6.1.188)
- Linux — Linux (6.6.157)

## References

- [CNA](https://git.kernel.org/stable/c/8e88ed8a374de67270d38689f2a81018909cafbb)
- [CNA](https://git.kernel.org/stable/c/9897b7da8c0ad8356c1b8649379fcb5a689462cb)
- [CNA](https://git.kernel.org/stable/c/38f822ddce9355893d734279a26ddec45182197e)
- [CNA](https://git.kernel.org/stable/c/bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc)
- [CNA](https://git.kernel.org/stable/c/ddb1b0d5d858584ed0d3a5aaa042ee693998c7e2)
- [CNA](https://git.kernel.org/stable/c/85dd5e8bd6776d02854f2847d83429f1f712e99c)
- [CNA](https://git.kernel.org/stable/c/502a7f5b79b7ba751988789e982924f8f496129f)
- [CNA](https://git.kernel.org/stable/c/bec7708eb3b5295d12e931db24381b7c94c72953)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.16%
- **EPSS Percentile:** 6.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._