CVE-2026-98763 (GCVE-0-2026-98763)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:47 – Updated: 2026-10-30 12:39
VLAI
Title
usb: core: clear both ep_in and ep_out for non-ep0 control endpoints
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: core: clear both ep_in and ep_out for non-ep0 control endpoints In usb_enable_endpoint(), non-zero control endpoints (where usb_endpoint_xfer_control(&ep->desc) is true) populate both dev->ep_in[epnum] and dev->ep_out[epnum] with the same struct usb_host_endpoint pointer. However, usb_disable_endpoint() only clears either dev->ep_out[epnum] or dev->ep_in[epnum] depending on the direction bit of epaddr when reset_hardware is set, leaving the opposite direction's array slot pointing to the disabled/freed endpoint. Clear both dev->ep_out[epnum] and dev->ep_in[epnum] when disabling a non-ep0 control endpoint with reset_hardware set, and update the function kerneldoc accordingly. Tested in QEMU against Linux 7.3.0-rc3 using dummy_hcd and raw-gadget to enumerate a USB device with a non-zero control endpoint (bEndpointAddress 0x01, bmAttributes USB_ENDPOINT_XFER_CONTROL), verifying that both dev->ep_in[1] and dev->ep_out[1] are cleared when the interface is disabled.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6820 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 59d2c9d70fa42e2290ff68e6430d38a1c817fcb7 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a7928ad4bbb330dfb0f726166384f319d66eb5d1 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b521fe45e06b3f7042e6d1f9566ddb6f179dcb1d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 198d74dcfa129523125f46a89479d3b446b17dbe (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7a9f61476b0e8002092a52ee8295edeeb0a28d1e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1da16c46b8d7101b74bc2d72a04e23cf5c7ddea1 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c50413ecb662ea43c7f487632c8114721743a277 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0e8baa78d872f2db440d8b9ded946ab8dceb89eb (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.273 , ≤ 5.10.* (semver)
Unaffected: 5.15.224 , ≤ 5.15.* (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.56 , ≤ 6.18.* (semver)
Unaffected: 7.2.10 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: core: clear both ep_in and ep_out for non-ep0 control endpoints\n\nIn usb_enable_endpoint(), non-zero control endpoints (where\nusb_endpoint_xfer_control(\u0026ep-\u003edesc) is true) populate both\ndev-\u003eep_in[epnum] and dev-\u003eep_out[epnum] with the same struct\nusb_host_endpoint pointer.\n\nHowever, usb_disable_endpoint() only clears either dev-\u003eep_out[epnum] or\ndev-\u003eep_in[epnum] depending on the direction bit of epaddr when\nreset_hardware is set, leaving the opposite direction\u0027s array slot\npointing to the disabled/freed endpoint.\n\nClear both dev-\u003eep_out[epnum] and dev-\u003eep_in[epnum] when disabling a\nnon-ep0 control endpoint with reset_hardware set, and update the\nfunction kerneldoc accordingly.\n\nTested in QEMU against Linux 7.3.0-rc3 using dummy_hcd and raw-gadget to\nenumerate a USB device with a non-zero control endpoint\n(bEndpointAddress 0x01, bmAttributes USB_ENDPOINT_XFER_CONTROL),\nverifying that both dev-\u003eep_in[1] and dev-\u003eep_out[1] are cleared when\nthe interface is disabled."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:39:32.238Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/59d2c9d70fa42e2290ff68e6430d38a1c817fcb7"
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        {
          "url": "https://git.kernel.org/stable/c/a7928ad4bbb330dfb0f726166384f319d66eb5d1"
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        },
        {
          "url": "https://git.kernel.org/stable/c/0e8baa78d872f2db440d8b9ded946ab8dceb89eb"
        }
      ],
      "title": "usb: core: clear both ep_in and ep_out for non-ep0 control endpoints",
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      }
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98763",
    "datePublished": "2026-10-18T15:47:54.526Z",
    "dateReserved": "2026-09-25T10:25:14.368Z",
    "dateUpdated": "2026-10-30T12:39:32.238Z",
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      "title": "usb: core: clear both ep_in and ep_out for non-ep0 control endpoints",
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          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: core: clear both ep_in and ep_out for non-ep0 control endpoints\n\nIn usb_enable_endpoint(), non-zero control endpoints (where\nusb_endpoint_xfer_control(\u0026ep-\u003edesc) is true) populate both\ndev-\u003eep_in[epnum] and dev-\u003eep_out[epnum] with the same struct\nusb_host_endpoint pointer.\n\nHowever, usb_disable_endpoint() only clears either dev-\u003eep_out[epnum] or\ndev-\u003eep_in[epnum] depending on the direction bit of epaddr when\nreset_hardware is set, leaving the opposite direction\u0027s array slot\npointing to the disabled/freed endpoint.\n\nClear both dev-\u003eep_out[epnum] and dev-\u003eep_in[epnum] when disabling a\nnon-ep0 control endpoint with reset_hardware set, and update the\nfunction kerneldoc accordingly.\n\nTested in QEMU against Linux 7.3.0-rc3 using dummy_hcd and raw-gadget to\nenumerate a USB device with a non-zero control endpoint\n(bEndpointAddress 0x01, bmAttributes USB_ENDPOINT_XFER_CONTROL),\nverifying that both dev-\u003eep_in[1] and dev-\u003eep_out[1] are cleared when\nthe interface is disabled."
          }
        ],
        "id": "CVE-2026-98763",
        "lastModified": "2026-10-30T13:21:25.763",
        "metrics": {},
        "published": "2026-10-18T16:17:30.113",
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            "url": "https://git.kernel.org/stable/c/59d2c9d70fa42e2290ff68e6430d38a1c817fcb7"
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            "url": "https://git.kernel.org/stable/c/b521fe45e06b3f7042e6d1f9566ddb6f179dcb1d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/c50413ecb662ea43c7f487632c8114721743a277"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-23T05:34:02+00:00",
      "cve": "CVE-2026-98763",
      "id": "CVE-2026-98763",
      "initial_release_date": "2026-10-18T00:00:00+00:00",
      "product_status:known_affected": "278",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb: core: clear both ep_in and ep_out for non-ep0 control endpoints",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98763.json",
      "version": "3"
    }
  }
}



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  • 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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