CVE-2026-93214usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 4bb8548df632187d5db50878e71804af5f7c51ad before abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277; from 4bb8548df632187d5db50878e71804af5f7c51ad before 3639438a4c83ffc2e564c8c010b92137c5d11cfa; from 4bb8548df632187d5db50878e71804af5f7c51ad before 78a14ea2284825055ab6c2a1f3489510f560f3a2; from 4bb8548df632187d5db50878e71804af5f7c51ad before eef3e62f90d86c1c5651742f84ecc9db1814a893; from 4bb8548df632187d5db50878e71804af5f7c51ad before f81a2da137b029a282b9bc64d2f267d242948659; from 4bb8548df632187d5db50878e71804af5f7c51ad before 6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9; from 4bb8548df632187d5db50878e71804af5f7c51ad before d90b0f90e30cd59b36005a4016b15cf02bcd7fb2; from 4bb8548df632187d5db50878e71804af5f7c51ad before 9dbf74f4022f80f7669d2b3c22c5deb46c1b5674 | CNA record |
References
- https://git.kernel.org/stable/c/abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277
- https://git.kernel.org/stable/c/3639438a4c83ffc2e564c8c010b92137c5d11cfa
- https://git.kernel.org/stable/c/78a14ea2284825055ab6c2a1f3489510f560f3a2
- https://git.kernel.org/stable/c/eef3e62f90d86c1c5651742f84ecc9db1814a893
- https://git.kernel.org/stable/c/f81a2da137b029a282b9bc64d2f267d242948659
- https://git.kernel.org/stable/c/6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9
- https://git.kernel.org/stable/c/d90b0f90e30cd59b36005a4016b15cf02bcd7fb2
- https://git.kernel.org/stable/c/9dbf74f4022f80f7669d2b3c22c5deb46c1b5674
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.