Answer in brief
CVE-2026-64347 records a Unknown severity vulnerability in usb: gadget: composite: fix dead empty check in the USB_DT_OTG handler. 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.
Answer in brief
CVE-2026-64347 records a Unknown severity vulnerability in usb: gadget: composite: fix dead empty check in the USB_DT_OTG handler. 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.
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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=53e6242db8d60da0587d36951cc9434d1a1c21dd <2454264b2ab4cf0055c0bfd39e79f830452bd0db || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <d3e72cfef2e38bd588055739a8100d14f9773b17 || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <8ac463fe6c0f85bdb1ce8c30e8c9e060802e4483 || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <56add2b9b2e89ec61c0761165d758f73004fdfdf || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <91b3ecd34b60f950c50c560974945b6596a6f207 || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <01feaf024f29618d5ffa7ab0fd858e0579dcbf7b || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <fcb21bf747640c9d6bd1eda9da85420f076d59c1 || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <f8f680609c2b3ab795ffcd6f21585b6dfc46d395 | 2454264b2ab4cf0055c0bfd39e79f830452bd0db, d3e72cfef2e38bd588055739a8100d14f9773b17, 8ac463fe6c0f85bdb1ce8c30e8c9e060802e4483, 56add2b9b2e89ec61c0761165d758f73004fdfdf, 91b3ecd34b60f950c50c560974945b6596a6f207, 01feaf024f29618d5ffa7ab0fd858e0579dcbf7b, fcb21bf747640c9d6bd1eda9da85420f076d59c1, f8f680609c2b3ab795ffcd6f21585b6dfc46d395 |
| Linux/Linuxgeneric | 4.3 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: composite: fix dead empty check in the USB_DT_OTG handler The OTG branch of composite_setup() falls back to the first configuration when none is selected: if (cdev->config) config = cdev->config; else config = list_first_entry(&cdev->configs, struct usb_configuration, list); if (!config) goto done; ... memcpy(req->buf, config->descriptors[0], value); list_first_entry() never returns NULL. On an empty list it returns container_of() of the list head. So the "if (!config)" check is dead. When cdev->configs is empty, config points at the head inside struct usb_composite_dev. config->descriptors[0] reads whatever sits at that offset. The memcpy copies up to w_length bytes of it into the response buffer. cdev->configs can be empty in two cases. One is a teardown race on gadget unbind with a control transfer in flight. The other is a driver that sets is_otg before it adds a config. A reproducer that holds cdev->configs empty triggers a KASAN fault in this branch. Use list_first_entry_or_null() so the existing check does its job.
Quoted source text, attributed separately from HOL analysis.
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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=53e6242db8d60da0587d36951cc9434d1a1c21dd <2454264b2ab4cf0055c0bfd39e79f830452bd0db || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <d3e72cfef2e38bd588055739a8100d14f9773b17 || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <8ac463fe6c0f85bdb1ce8c30e8c9e060802e4483 || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <56add2b9b2e89ec61c0761165d758f73004fdfdf || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <91b3ecd34b60f950c50c560974945b6596a6f207 || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <01feaf024f29618d5ffa7ab0fd858e0579dcbf7b || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <fcb21bf747640c9d6bd1eda9da85420f076d59c1 || >=53e6242db8d60da0587d36951cc9434d1a1c21dd <f8f680609c2b3ab795ffcd6f21585b6dfc46d395 | 2454264b2ab4cf0055c0bfd39e79f830452bd0db, d3e72cfef2e38bd588055739a8100d14f9773b17, 8ac463fe6c0f85bdb1ce8c30e8c9e060802e4483, 56add2b9b2e89ec61c0761165d758f73004fdfdf, 91b3ecd34b60f950c50c560974945b6596a6f207, 01feaf024f29618d5ffa7ab0fd858e0579dcbf7b, fcb21bf747640c9d6bd1eda9da85420f076d59c1, f8f680609c2b3ab795ffcd6f21585b6dfc46d395 |
| Linux/Linuxgeneric | 4.3 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: composite: fix dead empty check in the USB_DT_OTG handler The OTG branch of composite_setup() falls back to the first configuration when none is selected: if (cdev->config) config = cdev->config; else config = list_first_entry(&cdev->configs, struct usb_configuration, list); if (!config) goto done; ... memcpy(req->buf, config->descriptors[0], value); list_first_entry() never returns NULL. On an empty list it returns container_of() of the list head. So the "if (!config)" check is dead. When cdev->configs is empty, config points at the head inside struct usb_composite_dev. config->descriptors[0] reads whatever sits at that offset. The memcpy copies up to w_length bytes of it into the response buffer. cdev->configs can be empty in two cases. One is a teardown race on gadget unbind with a control transfer in flight. The other is a driver that sets is_otg before it adds a config. A reproducer that holds cdev->configs empty triggers a KASAN fault in this branch. Use list_first_entry_or_null() so the existing check does its job.
Quoted source text, attributed separately from HOL analysis.