Answer in brief
CVE-2026-64347 records a Medium severity (CVSS 5.5) 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.
CVSS is 5.5. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* | Not reported | Not reported |
| 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
Sep 3, 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.