CVE-2024-36977 (GCVE-0-2024-36977)
Vulnerability from cvelistv5
Published
2024-06-18 19:27
Modified
2025-05-04 09:13
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: Wait unconditionally after issuing EndXfer command Currently all controller IP/revisions except DWC3_usb3 >= 310a wait 1ms unconditionally for ENDXFER completion when IOC is not set. This is because DWC_usb3 controller revisions >= 3.10a supports GUCTL2[14: Rst_actbitlater] bit which allows polling CMDACT bit to know whether ENDXFER command is completed. Consider a case where an IN request was queued, and parallelly soft_disconnect was called (due to ffs_epfile_release). This eventually calls stop_active_transfer with IOC cleared, hence send_gadget_ep_cmd() skips waiting for CMDACT cleared during EndXfer. For DWC3 controllers with revisions >= 310a, we don't forcefully wait for 1ms either, and we proceed by unmapping the requests. If ENDXFER didn't complete by this time, it leads to SMMU faults since the controller would still be accessing those requests. Fix this by ensuring ENDXFER completion by adding 1ms delay in __dwc3_stop_active_transfer() unconditionally.
References
Impacted products
Vendor Product Version
Linux Linux Version: b353eb6dc285a0775a447f53e5b2a50bf3f9684f
Version: b353eb6dc285a0775a447f53e5b2a50bf3f9684f
Version: b353eb6dc285a0775a447f53e5b2a50bf3f9684f
Version: b353eb6dc285a0775a447f53e5b2a50bf3f9684f
Version: b353eb6dc285a0775a447f53e5b2a50bf3f9684f
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