CVE-2026-64347
CVE CVE-2026-64347EUVD EUVD-2026-48891Published 2026-07-25T08:50:08.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 7.1.4; patch: 6.18.39; patch: 0; 53e6242db8d60da0587d36951cc9434d1a1c21dd <01feaf024f29618d5ffa7ab0fd858e0579dcbf7b; patch: 6.12.96; patch: 6.6.145; 53e6242db8d60da0587d36951cc9434d1a1c21dd <2454264b2ab4cf0055c0bfd39e79f830452bd0db; 4.3; 53e6242db8d60da0587d36951cc9434d1a1c21dd <f8f680609c2b3ab795ffcd6f21585b6dfc46d395; patch: 5.10.261; patch: 5.15.212; 53e6242db8d60da0587d36951cc9434d1a1c21dd <8ac463fe6c0f85bdb1ce8c30e8c9e060802e4483; patch: 6.1.178; patch: 7.2-rc3; 53e6242db8d60da0587d36951cc9434d1a1c21dd <91b3ecd34b60f950c50c560974945b6596a6f207; 53e6242db8d60da0587d36951cc9434d1a1c21dd <d3e72cfef2e38bd588055739a8100d14f9773b17; 53e6242db8d60da0587d36951cc9434d1a1c21dd <fcb21bf747640c9d6bd1eda9da85420f076d59c1; 53e6242db8d60da0587d36951cc9434d1a1c21dd <56add2b9b2e89ec61c0761165d758f73004fdfdf
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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