{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93202","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-17T16:02:15.092Z","datePublished":"2026-09-17T16:12:23.071Z","dateUpdated":"2026-09-17T16:12:23.071Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-17T16:12:23.071Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: master: Fix recursive locking during device registration\n\ni3c_master_register_new_i3c_devs() registers newly discovered devices\nwhile holding i3c_bus_normaluse_lock(), a down_read().  device_register()\ncan immediately probe the device, and probe callbacks typically invoke\nI3C helpers that take i3c_bus_normaluse_lock() again, leading to a\nrecursive acquisition of the same rwsem.  rwsems do not support recursive\nread locking and can deadlock when a writer is waiting.  See the\n\"Recursive read locks\" section of Documentation/locking/lockdep-design.rst.\n\nFor example, with Intel LPSS I3C, LOCKDEP generates a WARNING like:\n  # echo intel-lpss-i3c.0 > /sys/bus/platform/drivers/mipi-i3c-hci/unbind\n  # echo intel-lpss-i3c.0 > /sys/bus/platform/drivers/mipi-i3c-hci/bind\n  WARNING: possible recursive locking detected\n  kworker/5:1/94 is trying to acquire lock:\n  ffff88811c810d78 (&i3cbus->lock){++++}-{4:4}, at: i3c_device_match_id+0x45/0x370\n  but task is already holding lock:\n  ffff88811c810d78 (&i3cbus->lock){++++}-{4:4}, at: i3c_master_reg_work_fn+0x21/0x5f0\n\nFix this by separating device creation from device registration.\nPopulate desc->dev under the maintenance lock, collect the devices that\nstill need registration into a local list, then release the lock before\ncalling device_register().  Finally retake the lock and clean up any\ndevices that failed to register.\n\nUse the maintenance lock rather than the normal-use lock while adding\ndevice objects.  A write-side maintenance lock prevents readers from\nobserving a partially initialized desc->dev during initial device\npopulation, or desc->dev disappearing if registration fails.\n\nThe local list requires a list node, so add a list node member to struct\ni3c_device."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/i3c/master.c","include/linux/i3c/master.h"],"versions":[{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","lessThan":"b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b","status":"affected","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","lessThan":"9dc73c51ed3ee965c3ddb0ac31cf5c3eea68fa0c","status":"affected","versionType":"git"},{"version":"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0","lessThan":"456f832e5fc26fbfd3b8200fd4553eee520cc377","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/i3c/master.c","include/linux/i3c/master.h"],"versions":[{"version":"5.0","status":"affected"},{"version":"0","lessThan":"5.0","status":"unaffected","versionType":"semver"},{"version":"6.18.52","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.6","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/b25232f66e8cd653d0c6bfdbe534e62a2f9d6a1b"},{"url":"https://git.kernel.org/stable/c/9dc73c51ed3ee965c3ddb0ac31cf5c3eea68fa0c"},{"url":"https://git.kernel.org/stable/c/456f832e5fc26fbfd3b8200fd4553eee520cc377"}],"title":"i3c: master: Fix recursive locking during device registration","x_generator":{"engine":"bippy-1.2.0"}}}}