Race Condition Vulnerability in Linux Kernel ATM Component
CVE-2025-38245
What is CVE-2025-38245?
A race condition has been identified in the Linux kernel’s ATM subsystem. This occurs during the deregistration of devices in the atm_dev_deregister() function. Specifically, the mutex is released after removing the device, which can result in a brief period where the device is no longer on the device list, but related procfs/sysfs entries remain active. If a device is being added during this window, it may lead to warnings or failures due to duplicate registrations. To mitigate this issue, the mutex should be held until all procfs/sysfs entries are completely removed.
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Affected Version(s)
Linux 64bf69ddff7637b7ed7acf9b2a823cc0ee519439 < 2a8dcee649d12f69713f2589171a1caf6d4fa439
Linux 64bf69ddff7637b7ed7acf9b2a823cc0ee519439 < 4bb1bb438134d9ee6b97cc07289dd7c569092eec
Linux 64bf69ddff7637b7ed7acf9b2a823cc0ee519439 < 26248d5d68c865b888d632162abbf8130645622c