Vulnerability-Lookup

CVE-2026-63927 (GCVE-0-2026-63927)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-10-19 20:17

Title

usb: dwc2: Fix use after free in debug code

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: dwc2: Fix use after free in debug code We're not allowed to dereference "urb" after calling usb_hcd_giveback_urb() so save the urb->status ahead of time.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-16 15:33 UTC

CWE

CWE-416 - Use After Free

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6843 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/d5fc183ed614aeba6…
https://git.kernel.org/stable/c/63b0dafa676aad4d0…
https://git.kernel.org/stable/c/9fe1d84f7e2cf3363…
https://git.kernel.org/stable/c/0584af4fe40fa5e25…
https://git.kernel.org/stable/c/a15eeeceb94cbc04e…
https://git.kernel.org/stable/c/84ea928ed584756e5…
https://git.kernel.org/stable/c/6d0b79d1d1118145e…
https://git.kernel.org/stable/c/9ea06a3fbf9f16e0d…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 7359d482eb4d3967cc8be354405ae6be6eaf732c , < d5fc183ed614aeba6779cc992325be560f9a4451 (git) Affected: 7359d482eb4d3967cc8be354405ae6be6eaf732c , < 63b0dafa676aad4d0c3f01a61ad8e2990907660c (git) Affected: 7359d482eb4d3967cc8be354405ae6be6eaf732c , < 9fe1d84f7e2cf33634e8afb7f4b7f8de182dd913 (git) Affected: 7359d482eb4d3967cc8be354405ae6be6eaf732c , < 0584af4fe40fa5e254a05d69ce658746de641708 (git) Affected: 7359d482eb4d3967cc8be354405ae6be6eaf732c , < a15eeeceb94cbc04edef395e4d777ff554bdc27d (git) Affected: 7359d482eb4d3967cc8be354405ae6be6eaf732c , < 84ea928ed584756e59c6ac09736f12d1db95ded0 (git) Affected: 7359d482eb4d3967cc8be354405ae6be6eaf732c , < 6d0b79d1d1118145e48a68192b6d733e39387053 (git) Affected: 7359d482eb4d3967cc8be354405ae6be6eaf732c , < 9ea06a3fbf9f16e0d98c52cb3b99642be15ec281 (git)	guessed
Linux	Linux	Affected: 3.10 Unaffected: 0 , < 3.10 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.93 , ≤ 6.12.* (semver) Unaffected: 6.18.35 , ≤ 6.18.* (semver) Unaffected: 7.0.12 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

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          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-12T15:37:30+00:00",
      "cve": "CVE-2026-63927",
      "id": "CVE-2026-63927",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "77",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb: dwc2: Fix use after free in debug code",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63927.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-63927",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-10-16T15:33:40.424795Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-416",
                    "description": "CWE-416 Use After Free",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-10-16T15:33:41.024Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/usb/dwc2/hcd.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "d5fc183ed614aeba6779cc992325be560f9a4451",
                  "status": "affected",
                  "version": "7359d482eb4d3967cc8be354405ae6be6eaf732c",
                  "versionType": "git"
                },
                {
                  "lessThan": "63b0dafa676aad4d0c3f01a61ad8e2990907660c",
                  "status": "affected",
                  "version": "7359d482eb4d3967cc8be354405ae6be6eaf732c",
                  "versionType": "git"
                },
                {
                  "lessThan": "9fe1d84f7e2cf33634e8afb7f4b7f8de182dd913",
                  "status": "affected",
                  "version": "7359d482eb4d3967cc8be354405ae6be6eaf732c",
                  "versionType": "git"
                },
                {
                  "lessThan": "0584af4fe40fa5e254a05d69ce658746de641708",
                  "status": "affected",
                  "version": "7359d482eb4d3967cc8be354405ae6be6eaf732c",
                  "versionType": "git"
                },
                {
                  "lessThan": "a15eeeceb94cbc04edef395e4d777ff554bdc27d",
                  "status": "affected",
                  "version": "7359d482eb4d3967cc8be354405ae6be6eaf732c",
                  "versionType": "git"
                },
                {
                  "lessThan": "84ea928ed584756e59c6ac09736f12d1db95ded0",
                  "status": "affected",
                  "version": "7359d482eb4d3967cc8be354405ae6be6eaf732c",
                  "versionType": "git"
                },
                {
                  "lessThan": "6d0b79d1d1118145e48a68192b6d733e39387053",
                  "status": "affected",
                  "version": "7359d482eb4d3967cc8be354405ae6be6eaf732c",
                  "versionType": "git"
                },
                {
                  "lessThan": "9ea06a3fbf9f16e0d98c52cb3b99642be15ec281",
                  "status": "affected",
                  "version": "7359d482eb4d3967cc8be354405ae6be6eaf732c",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/usb/dwc2/hcd.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "3.10"
                },
                {
                  "lessThan": "3.10",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.259",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.210",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.176",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.143",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.12.*",
                  "status": "unaffected",
                  "version": "6.12.93",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.18.*",
                  "status": "unaffected",
                  "version": "6.18.35",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.0.*",
                  "status": "unaffected",
                  "version": "7.0.12",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "7.1",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.259",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.210",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.176",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.143",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12.93",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.18.35",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "7.0.12",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "7.1",
                      "versionStartIncluding": "3.10",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc2: Fix use after free in debug code\n\nWe\u0027re not allowed to dereference \"urb\" after calling\nusb_hcd_giveback_urb() so save the urb-\u003estatus ahead of time."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The vulnerable dwc2 HCD urb_dequeue path is reached from local usbfs ioctls (USBDEVFS_SUBMITURB/DISCARDURB) on /dev/bus/usb device nodes, as well as from kernel unlink paths during USB I/O cancellation on dwc2-equipped embedded systems, kiosks, and mobile OTG hosts.\nAC:L - Once debug is enabled, an attacker can reliably drive the path by submitting and cancelling URBs (or forcing disconnect/error unlink storms) and can control the HCD_BH giveback race by running concurrent cancellation requests.\nPR:L - Triggering urb dequeue via usbfs requires only local user access to a USB device node (typically root or plugdev-group membership), which is low privilege and commonly available on dwc2 embedded platforms; no real root in the init namespace is required.\nUI:N - Exploitation requires only the attacker to submit and cancel USB transfers (or insert/disconnect a malicious USB device); no action by a separate victim user is needed.\nS:U - The UAF corrupts kernel heap memory within the kernel\u0027s own security authority and does not by itself cross a VM, container, or IOMMU boundary.\nC:H - Use-after-free of a kmalloc-backed struct urb after giveback can be groomed via heap spraying to obtain arbitrary kernel memory read primitives, not merely a bounded leak.\nI:H - UAF on the URB object in the general kmalloc slab enables attacker-controlled reuse of freed memory, supporting control-flow hijack and arbitrary kernel write/code execution.\nA:H - The post-giveback dereference can cause kernel oops/panic during URB teardown, and successful UAF exploitation can crash or hang the system."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T12:37:22.350Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/d5fc183ed614aeba6779cc992325be560f9a4451"
            },
            {
              "url": "https://git.kernel.org/stable/c/63b0dafa676aad4d0c3f01a61ad8e2990907660c"
            },
            {
              "url": "https://git.kernel.org/stable/c/9fe1d84f7e2cf33634e8afb7f4b7f8de182dd913"
            },
            {
              "url": "https://git.kernel.org/stable/c/0584af4fe40fa5e254a05d69ce658746de641708"
            },
            {
              "url": "https://git.kernel.org/stable/c/a15eeeceb94cbc04edef395e4d777ff554bdc27d"
            },
            {
              "url": "https://git.kernel.org/stable/c/84ea928ed584756e59c6ac09736f12d1db95ded0"
            },
            {
              "url": "https://git.kernel.org/stable/c/6d0b79d1d1118145e48a68192b6d733e39387053"
            },
            {
              "url": "https://git.kernel.org/stable/c/9ea06a3fbf9f16e0d98c52cb3b99642be15ec281"
            }
          ],
          "title": "usb: dwc2: Fix use after free in debug code",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2026-63927",
        "datePublished": "2026-07-19T14:55:27.864Z",
        "dateReserved": "2026-07-19T07:54:57.021Z",
        "dateUpdated": "2026-10-19T20:17:57.379Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

SUSE-SU-2026:23231-1

Vulnerability from csaf_suse - Published: 2026-08-11 21:26 - Updated: 2026-10-20 09:48

Summary

Security update for the Linux Kernel

Severity

Important

Scope

894 vulnerabilities in this advisory, including CVE-2026-63927.

CVE-2026-63927

4.1 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Recommended: 114 products

Open the full advisory

SUSE-SU-2026:23237-1

Vulnerability from csaf_suse - Published: 2026-08-11 21:34 - Updated: 2026-10-20 09:48

Summary

Security update for the Linux Kernel

Severity

Important

Scope

894 vulnerabilities in this advisory, including CVE-2026-63927.

CVE-2026-63927

4.1 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Recommended: 9 products

Open the full advisory

SUSE-SU-2026:23241-1

Vulnerability from csaf_suse - Published: 2026-08-18 20:43 - Updated: 2026-10-22 17:10

Summary

Security update for the Linux Kernel

Severity

Important

Scope

648 vulnerabilities in this advisory, including CVE-2026-63927.

CVE-2026-63927

4.1 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Recommended: 4 products

Open the full advisory

SUSE-SU-2026:23244-1

Vulnerability from csaf_suse - Published: 2026-08-18 20:52 - Updated: 2026-10-22 17:10

Summary

Security update for the Linux Kernel

Severity

Important

Scope

647 vulnerabilities in this advisory, including CVE-2026-63927.

CVE-2026-63927

4.1 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Recommended: 9 products

Open the full advisory

SUSE-SU-2026:3594-1

Vulnerability from csaf_suse - Published: 2026-08-12 11:31 - Updated: 2026-09-26 08:32

Summary

Security update for the Linux Kernel

Severity

Important

Scope

189 vulnerabilities in this advisory, including CVE-2026-63927.

CVE-2026-63927

4.1 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Recommended: 164 products

Open the full advisory

SUSE-SU-2026:3810-1

Vulnerability from csaf_suse - Published: 2026-08-26 10:47 - Updated: 2026-10-22 17:11

Summary

Security update for the Linux Kernel

Severity

Important

Scope

267 vulnerabilities in this advisory, including CVE-2026-63927.

CVE-2026-63927

4.1 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Recommended: 19 products

Open the full advisory

UBUNTU-CVE-2026-63927 (CVE-2026-63927)

Vulnerability from osv_ubuntu – Published: 2026-07-20 00:00 – Updated: 2026-10-14 00:15 – Source website

Details

Severity

7.8 (High)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2026-63927	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-63927	REPORT
	https://git.kernel.org/linus/9ea06a3fbf9f16e0d98c…	REPORT
	https://ubuntu.com/security/notices/USN-8593-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8603-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8618-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8663-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8664-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8728-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8728-2	ADVISORY
	https://ubuntu.com/security/notices/USN-8728-3	ADVISORY
	https://ubuntu.com/security/notices/USN-8878-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8879-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8877-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8875-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8886-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8903-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8905-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8906-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8904-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8903-2	ADVISORY
	https://ubuntu.com/security/notices/USN-8875-2	ADVISORY
	https://ubuntu.com/security/notices/USN-8905-2	ADVISORY

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WID-SEC-W-2026-2403

Vulnerability from csaf_certbund - Published: 2026-07-19 22:00 - Updated: 2026-08-31 22:00

Summary

Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Severity

Mittel

Scope

432 vulnerabilities in this advisory, including CVE-2026-63927.

CVE-2026-63927

Known affected: 10 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-63927 (GCVE-0-2026-63927)

SUSE-SU-2026:23231-1

SUSE-SU-2026:23237-1

SUSE-SU-2026:23241-1

SUSE-SU-2026:23244-1

SUSE-SU-2026:3594-1

SUSE-SU-2026:3810-1

UBUNTU-CVE-2026-63927 (CVE-2026-63927)

WID-SEC-W-2026-2403

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour