i3c: master: Fix recursive locking during device registration
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
CVE-2026-93202
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-93202
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
"lessThan": "6640f778aa3d430e67171f8d17fe4a35bb44b578",
"versionType": "git"
},
{
"status": "affected",
"version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
"lessThan": "0200dc55e68cc0177b6e60919de415cc96fdd4e1",
"versionType": "git"
},
{
"status": "affected",
"version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
"lessThan": "b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b",
"versionType": "git"
},
{
"status": "affected",
"version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
"lessThan": "9dc73c51ed3ee965c3ddb0ac31cf5c3eea68fa0c",
"versionType": "git"
},
{
"status": "affected",
"version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
"lessThan": "456f832e5fc26fbfd3b8200fd4553eee520cc377",
"versionType": "git"
}
],
"programFiles": [
"drivers/i3c/master.c",
"include/linux/i3c/master.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/i3c/master.c",
"include/linux/i3c/master.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93202
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48733 · Revision 1
- Added to Heist Feed
- Publisher date