CVE-2024-36977

usb: dwc3: Wait unconditionally after issuing EndXfer command

State: Published
Severity: 7.8 High
Published: Jun 18, 2024
Updated: Aug 5, 2026
Reserved: May 30, 2024

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux
3.1	4.7 Medium	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	b353eb6dc285a0775a447f53e5b2a50bf3f9684f to before 341eb08dbca9eae05308c442fbfab1813a44c97aAffected b353eb6dc285a0775a447f53e5b2a50bf3f9684f to before ec96bcf5f96a7a5c556b0e881ac3e5c3924d542cAffected b353eb6dc285a0775a447f53e5b2a50bf3f9684f to before 4a387e032909c6dc2b479452c5bbe9a252057925Affected b353eb6dc285a0775a447f53e5b2a50bf3f9684f to before 1ba145f05b5c8f0b1a947a0633b5edff5dd1f1c5Affected b353eb6dc285a0775a447f53e5b2a50bf3f9684f to before 1d26ba0944d398f88aaf997bda3544646cf21945Affected
LinuxLinux	6.1Affected before 6.1Not affected 6.1.92 through 6.1.Not affected 6.6.32 through 6.6.Not affected 6.8.11 through 6.8.Not affected 6.9.2 through 6.9.Not affected 6.10 and laterNot affected

Product

Versions

LinuxLinux

b353eb6dc285a0775a447f53e5b2a50bf3f9684f to before 341eb08dbca9eae05308c442fbfab1813a44c97aAffected
b353eb6dc285a0775a447f53e5b2a50bf3f9684f to before ec96bcf5f96a7a5c556b0e881ac3e5c3924d542cAffected
b353eb6dc285a0775a447f53e5b2a50bf3f9684f to before 4a387e032909c6dc2b479452c5bbe9a252057925Affected
b353eb6dc285a0775a447f53e5b2a50bf3f9684f to before 1ba145f05b5c8f0b1a947a0633b5edff5dd1f1c5Affected
b353eb6dc285a0775a447f53e5b2a50bf3f9684f to before 1d26ba0944d398f88aaf997bda3544646cf21945Affected

LinuxLinux

6.1Affected
before 6.1Not affected
6.1.92 through 6.1.*Not affected
6.6.32 through 6.6.*Not affected
6.8.11 through 6.8.*Not affected
6.9.2 through 6.9.*Not affected
6.10 and laterNot affected

References

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