{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"MEDIUM" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"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().", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2025-68331" }, { "summary":"CVE-2025-68331 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2025/csaf-openeuler-cve-2025-68331.json" }, { "summary":"openEuler-SA-2026-1761", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1761" }, { "summary":"CVE-2025-68331", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2025-68331&packageName=kernel" } ], "title":"openEuler cve CVE-2025-68331", "tracking":{ "initial_release_date":"2026-03-30T15:49:39+08:00", "revision_history":[ { "date":"2026-03-30T15:49:39+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-03-30T15:49:39+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-03-30T15:49:39+08:00", "id":"CVE-2025-68331", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP2" }, "product_id":"openEuler-24.03-LTS-SP2", "name":"openEuler-24.03-LTS-SP2" }, "name":"openEuler-24.03-LTS-SP2", "category":"product_version" } ], "category":"product_name" }, { "name":"aarch64", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP2" }, "product_id":"bpftool-6.6.0-144.0.0.140.oe2403sp2.aarch64.rpm", "name":"bpftool-6.6.0-144.0.0.140.oe2403sp2.aarch64.rpm" }, "name":"bpftool-6.6.0-144.0.0.140.oe2403sp2.aarch64.rpm", "category":"product_version" }, { "product":{ 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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().", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":{ "$ref":"$.vulnerabilities[0].product_status.fixed" } }, "remediations":[ { "product_ids":{ "$ref":"$.vulnerabilities[0].product_status.fixed" }, "details":"kernel security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1761" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"MEDIUM", "baseScore":5.5, "vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version":"3.1" }, "products":{ "$ref":"$.vulnerabilities[0].product_status.fixed" } } ], "threats":[ { "details":"Medium", "category":"impact" } ], "title":"CVE-2025-68331" } ] }