CVE-2026-93214

UNKNOWN 0.0

usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_tcm: fix deadlock in usbg_make_tpg() usbg_make_tpg() held dep_lock while calling configfs_depend_item_unlocked(), which acquires the configfs root inode lock when operating across subsystems. This creates a circular lock dependency with configfs_rmdir(): dep_lock -> configfs root inode lock -> su_mutex -> dep_lock In usbg_make_tpg(), dep_lock only serialized the read of opts->ready, which is a monotonic flag that transitions from false to true exactly once (in tcm_set_name()) and never reverts. Remove dep_lock from usbg_make_tpg() entirely and use READ_ONCE/WRITE_ONCE to access opts->ready locklessly instead.

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Sep 24, 2026

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Affected Versions

Linux / Linux

4bb8548df632187d5db50878e71804af5f7c51ad < abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277 4bb8548df632187d5db50878e71804af5f7c51ad < 3639438a4c83ffc2e564c8c010b92137c5d11cfa 4bb8548df632187d5db50878e71804af5f7c51ad < 78a14ea2284825055ab6c2a1f3489510f560f3a2 4bb8548df632187d5db50878e71804af5f7c51ad < eef3e62f90d86c1c5651742f84ecc9db1814a893 4bb8548df632187d5db50878e71804af5f7c51ad < f81a2da137b029a282b9bc64d2f267d242948659 4bb8548df632187d5db50878e71804af5f7c51ad < 6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9 4bb8548df632187d5db50878e71804af5f7c51ad < d90b0f90e30cd59b36005a4016b15cf02bcd7fb2 4bb8548df632187d5db50878e71804af5f7c51ad < 9dbf74f4022f80f7669d2b3c22c5deb46c1b5674

Linux / Linux

4.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗