usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind() (CVE-2026-89733) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89733

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

Answer in brief

CVE-2026-89733 records a Unknown severity vulnerability in usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=0f9df939385527049c8062a099fbfa1479fe7ce0 <8e88ed8a374de67270d38689f2a81018909cafbb \|\| >=0f9df939385527049c8062a099fbfa1479fe7ce0 <9897b7da8c0ad8356c1b8649379fcb5a689462cb \|\| >=0f9df939385527049c8062a099fbfa1479fe7ce0 <38f822ddce9355893d734279a26ddec45182197e \|\| >=0f9df939385527049c8062a099fbfa1479fe7ce0 <bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc \|\| 1efa8a5aac93d9e67075995d7d4902b57ce184f7 \|\| e7a4b0efe62e56a0acc81d16091c6efc2a282be8 \|\| 065f5561a20659cf17aae5f72b32b5c2695c8e00 \|\| >=3.2.36 <3.3 \|\| >=3.4.25 <3.5 \|\| >=3.7.2 <3.8	8e88ed8a374de67270d38689f2a81018909cafbb, 9897b7da8c0ad8356c1b8649379fcb5a689462cb, 38f822ddce9355893d734279a26ddec45182197e, bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc, 3.3, 3.5, 3.8
Linux/Linuxgeneric	3.8	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 8e88ed8a374de67270d38689f2a81018909cafbb if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source 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().

Quoted source text, attributed separately from HOL analysis.