CVE-2022-48790 (GCVE-0-2022-48790)
Vulnerability from cvelistv5
Published
2024-07-16 11:43
Modified
2025-12-23 13:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nvme: fix a possible use-after-free in controller reset during load Unlike .queue_rq, in .submit_async_event drivers may not check the ctrl readiness for AER submission. This may lead to a use-after-free condition that was observed with nvme-tcp. The race condition may happen in the following scenario: 1. driver executes its reset_ctrl_work 2. -> nvme_stop_ctrl - flushes ctrl async_event_work 3. ctrl sends AEN which is received by the host, which in turn schedules AEN handling 4. teardown admin queue (which releases the queue socket) 5. AEN processed, submits another AER, calling the driver to submit 6. driver attempts to send the cmd ==> use-after-free In order to fix that, add ctrl state check to validate the ctrl is actually able to accept the AER submission. This addresses the above race in controller resets because the driver during teardown should: 1. change ctrl state to RESETTING 2. flush async_event_work (as well as other async work elements) So after 1,2, any other AER command will find the ctrl state to be RESETTING and bail out without submitting the AER.
References
Impacted products
Vendor Product Version
Linux Linux Version: ad22c355b707a8d8d48e282aadc01c0b0604b2e9
Version: ad22c355b707a8d8d48e282aadc01c0b0604b2e9
Version: ad22c355b707a8d8d48e282aadc01c0b0604b2e9
Version: ad22c355b707a8d8d48e282aadc01c0b0604b2e9
Version: ad22c355b707a8d8d48e282aadc01c0b0604b2e9
Version: ad22c355b707a8d8d48e282aadc01c0b0604b2e9
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