CVE-2026-93202i3c: master: Fix recursive locking during device registration
- —Not scoredno CVSS score yet
- 0.16%Exploitation in 30 daysEPSS · top 95% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: i3c: master: Fix recursive locking during device registration i3c_master_register_new_i3c_devs() registers newly discovered devices while holding i3c_bus_normaluse_lock(), a down_read(). device_register() can immediately probe the device, and probe callbacks typically invoke I3C helpers that take i3c_bus_normaluse_lock() again, leading to a recursive acquisition of the same rwsem. rwsems do not support recursive read locking and can deadlock when a writer is waiting. See the "Recursive read locks" section of Documentation/locking/lockdep-design.rst. For example, with Intel LPSS I3C, LOCKDEP generates a WARNING like: # echo intel-lpss-i3c.0 > /sys/bus/platform/drivers/mipi-i3c-hci/unbind # echo intel-lpss-i3c.0 > /sys/bus/platform/drivers/mipi-i3c-hci/bind WARNING: possible recursive locking detected kworker/5:1/94 is trying to acquire lock: ffff88811c810d78 (&i3cbus->lock){++++}-{4:4}, at: i3c_device_match_id+0x45/0x370 but task is already holding lock: ffff88811c810d78 (&i3cbus->lock){++++}-{4:4}, at: i3c_master_reg_work_fn+0x21/0x5f0 Fix this by separating device creation from device registration. Populate desc->dev under the maintenance lock, collect the devices that still need registration into a local list, then release the lock before calling device_register(). Finally retake the lock and clean up any devices that failed to register. Use the maintenance lock rather than the normal-use lock while adding device objects. A write-side maintenance lock prevents readers from observing a partially initialized desc->dev during initial device population, or desc->dev disappearing if registration fails. The local list requires a list node, so add a list node member to struct i3c_device.
Timeline
ID reserved
By Linux
Published
- 43 days later
· 43 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < 015fcf330c29803bbf92b719b4889ba74ecbbc71
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < 6640f778aa3d430e67171f8d17fe4a35bb44b578
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < 0200dc55e68cc0177b6e60919de415cc96fdd4e1
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < 9dc73c51ed3ee965c3ddb0ac31cf5c3eea68fa0c
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < 456f832e5fc26fbfd3b8200fd4553eee520cc377
- affected 5.0
- unaffected < 5.0
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/015fcf330c29803bbf92b719b4889ba74ecbbc71 (opens in a new tab)
- https://git.kernel.org/stable/c/6640f778aa3d430e67171f8d17fe4a35bb44b578 (opens in a new tab)
- https://git.kernel.org/stable/c/0200dc55e68cc0177b6e60919de415cc96fdd4e1 (opens in a new tab)
- https://git.kernel.org/stable/c/b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b (opens in a new tab)
- https://git.kernel.org/stable/c/9dc73c51ed3ee965c3ddb0ac31cf5c3eea68fa0c (opens in a new tab)
- https://git.kernel.org/stable/c/456f832e5fc26fbfd3b8200fd4553eee520cc377 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-82310 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-93202)Record last updated .