CVE-2026-64327
CVE CVE-2026-64327EUVD EUVD-2026-48871Published 2026-07-25T08:49:55.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: Initialize epfile->in early to fix endpoint direction checks When parsing endpoint descriptors, ffs_data_got_descs() generates the eps_addrmap which contains the endpoint direction. However, epfile->in was previously only populated in ffs_func_eps_enable() which executes upon USB host connection. As a result, early userspace ioctls like FUNCTIONFS_DMABUF_ATTACH that run before the host connects would see epfile->in as 0, leading to incorrect DMA directions. By moving the initialization to ffs_epfiles_create(), epfile->in is accurate before userspace opens the endpoint files.
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: 6.12.96; 7b07a2a7ca02a20124b552be96c5a56910795488 <82cfd4739011bdc7e87b5d585703427e89ddfaa5; patch: 6.18.39; patch: 7.1.4; 6.9; patch: 0; 7b07a2a7ca02a20124b552be96c5a56910795488 <f99f32ea9aa976afcbec20647ed33b50a52002c1; 7b07a2a7ca02a20124b552be96c5a56910795488 <9e04055ab5fc0470a0031ee6934739f9aa8f34a5; patch: 7.2-rc3; 7b07a2a7ca02a20124b552be96c5a56910795488 <82cf1142e5ccf2b6d6d22ef713aaf3e5f2b5716b
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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