CVE-2026-93214

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

State: Published
Severity: Not scored
Published: Sep 24, 2026
Updated: Oct 19, 2026
Reserved: Sep 17, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	4bb8548df632187d5db50878e71804af5f7c51ad to before abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277Affected 4bb8548df632187d5db50878e71804af5f7c51ad to before 3639438a4c83ffc2e564c8c010b92137c5d11cfaAffected 4bb8548df632187d5db50878e71804af5f7c51ad to before 78a14ea2284825055ab6c2a1f3489510f560f3a2Affected 4bb8548df632187d5db50878e71804af5f7c51ad to before eef3e62f90d86c1c5651742f84ecc9db1814a893Affected 4bb8548df632187d5db50878e71804af5f7c51ad to before f81a2da137b029a282b9bc64d2f267d242948659Affected 4bb8548df632187d5db50878e71804af5f7c51ad to before 6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9Affected 4bb8548df632187d5db50878e71804af5f7c51ad to before d90b0f90e30cd59b36005a4016b15cf02bcd7fb2Affected 4bb8548df632187d5db50878e71804af5f7c51ad to before 9dbf74f4022f80f7669d2b3c22c5deb46c1b5674Affected
LinuxLinux	4.5Affected before 4.5Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.109 through 6.12.Not affected 6.18.50 through 6.18.Not affected 7.2.4 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

4bb8548df632187d5db50878e71804af5f7c51ad to before abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277Affected
4bb8548df632187d5db50878e71804af5f7c51ad to before 3639438a4c83ffc2e564c8c010b92137c5d11cfaAffected
4bb8548df632187d5db50878e71804af5f7c51ad to before 78a14ea2284825055ab6c2a1f3489510f560f3a2Affected
4bb8548df632187d5db50878e71804af5f7c51ad to before eef3e62f90d86c1c5651742f84ecc9db1814a893Affected
4bb8548df632187d5db50878e71804af5f7c51ad to before f81a2da137b029a282b9bc64d2f267d242948659Affected
4bb8548df632187d5db50878e71804af5f7c51ad to before 6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9Affected
4bb8548df632187d5db50878e71804af5f7c51ad to before d90b0f90e30cd59b36005a4016b15cf02bcd7fb2Affected
4bb8548df632187d5db50878e71804af5f7c51ad to before 9dbf74f4022f80f7669d2b3c22c5deb46c1b5674Affected

LinuxLinux

4.5Affected
before 4.5Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.109 through 6.12.*Not affected
6.18.50 through 6.18.*Not affected
7.2.4 through 7.2.*Not affected
7.3 and laterNot affected

References

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