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CVE-2026-64327

usb: gadget: f_fs: Initialize epfile->in early to fix endpoint direction checks

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 7b07a2a7ca02a20124b552be96c5a56910795488
Version < 82cf1142e5ccf2b6d6d22ef713aaf3e5f2b5716b
Status affected
Version 7b07a2a7ca02a20124b552be96c5a56910795488
Version < 9e04055ab5fc0470a0031ee6934739f9aa8f34a5
Status affected
Version 7b07a2a7ca02a20124b552be96c5a56910795488
Version < f99f32ea9aa976afcbec20647ed33b50a52002c1
Status affected
Version 7b07a2a7ca02a20124b552be96c5a56910795488
Version < 82cfd4739011bdc7e87b5d585703427e89ddfaa5
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.9
Status affected
Version 0
Version < 6.9
Status unaffected
Version <= 6.12.*
Version 6.12.96
Status unaffected
Version <= 6.18.*
Version 6.18.39
Status unaffected
Version <= 7.1.*
Version 7.1.4
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.2% 0.101
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/82cf1142e5ccf2b6d6d22ef713aaf3e5f2b5716b
https://git.kernel.org/stable/c/9e04055ab5fc0470a0031ee6934739f9aa8f34a5
https://git.kernel.org/stable/c/f99f32ea9aa976afcbec20647ed33b50a52002c1
https://git.kernel.org/stable/c/82cfd4739011bdc7e87b5d585703427e89ddfaa5