{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-23T12:31:38.522","vulnerabilities":[{"cve":{"id":"CVE-2025-68331","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-12-22T17:16:00.800","lastModified":"2026-04-15T00:35:42.020","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: uas: fix urb unmapping issue when the uas device is remove during ongoing data transfer\n\nWhen a UAS device is unplugged during data transfer, there is\na probability of a system panic occurring. The root cause is\nan access to an invalid memory address during URB callback handling.\nSpecifically, this happens when the dma_direct_unmap_sg() function\nis called within the usb_hcd_unmap_urb_for_dma() interface, but the\nsg->dma_address field is 0 and the sg data structure has already been\nfreed.\n\nThe SCSI driver sends transfer commands by invoking uas_queuecommand_lck()\nin uas.c, using the uas_submit_urbs() function to submit requests to USB.\nWithin the uas_submit_urbs() implementation, three URBs (sense_urb,\ndata_urb, and cmd_urb) are sequentially submitted. Device removal may\noccur at any point during uas_submit_urbs execution, which may result\nin URB submission failure. However, some URBs might have been successfully\nsubmitted before the failure, and uas_submit_urbs will return the -ENODEV\nerror code in this case. The current error handling directly calls\nscsi_done(). In the SCSI driver, this eventually triggers scsi_complete()\nto invoke scsi_end_request() for releasing the sgtable. The successfully\nsubmitted URBs, when being unlinked to giveback, call\nusb_hcd_unmap_urb_for_dma() in hcd.c, leading to exceptions during sg\nunmapping operations since the sg data structure has already been freed.\n\nThis patch modifies the error condition check in the uas_submit_urbs()\nfunction. When a UAS device is removed but one or more URBs have already\nbeen successfully submitted to USB, it avoids immediately invoking\nscsi_done() and save the cmnd to devinfo->cmnd array. If the successfully\nsubmitted URBs is completed before devinfo->resetting being set, then\nthe scsi_done() function will be called within uas_try_complete() after\nall pending URB operations are finalized. Otherwise, the scsi_done()\nfunction will be called within uas_zap_pending(), which is executed after\nusb_kill_anchored_urbs().\n\nThe error handling only takes effect when uas_queuecommand_lck() calls\nuas_submit_urbs() and returns the error value -ENODEV . In this case,\nthe device is disconnected, and the flow proceeds to uas_disconnect(),\nwhere uas_zap_pending() is invoked to call uas_try_complete()."}],"metrics":{},"references":[{"url":"https://git.kernel.org/stable/c/26d56a9fcb2014b99e654127960aa0a48a391e3c","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2b90a8131c83f6f2be69397d2b7d14d217d95d2f","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/426edbfc88b22601ea34a441a469092e7b301c52","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6289fc489e94c9beb6be2b502ccc263663733d72","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/66ac05e7b0d6bbd1bee9fcf729e20fd4cce86d17","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/75f8e2643085db4f7e136fc6b368eb114dd80a64","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e3a55221f4de080cb7a91ba10f01c4f708603f8d","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}]}}]}