FKIE_CVE-2026-98757

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-30 13:21
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: fix use-after-free in cdns3_gadget_exit() cdns3_gadget_start() arms two works on system_freezable_wq: pending_status_wq for the deferred ep0 status stage and aligned_buf_wq for realigned request buffers. Both handlers use the cdns3_device the works are embedded in, and cdns3_pending_setup_status_handler() also calls the ep0 request completion. cdns3_gadget_exit() does not wait for these works. It frees all endpoints and aligned buffers and drops the last reference to the gadget device, which frees priv_dev, so a work queued before the exit can run after the free. Fix this by waiting for both works after the gadget driver is unbound and the IRQ is freed, when no new work can be queued, and before the endpoints and buffers are released. This issue was found by an in-house static analysis tool.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/159dada48ee2d53eff46e66a8011d67b2c209bbc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5d148a6afe13db0ba0e7a83e0e355ff5b7d6e3e8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8650216d82e7713a0083377ebcc3a2af5978c8a8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95160fe606e685ff18de1e6ddcbc08289476004e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a980a250de22bb4a487e935176d5f7a6b81f9a02
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cc448700db656cceb4b411bf99a2e7132144d035
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ebe9b68c396792c15d0ac690d592e449e74ed804
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/efdf0ddaed01161dc1c1f25382856f2fd1c1f44f
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/cdns3/cdns3-gadget.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a980a250de22bb4a487e935176d5f7a6b81f9a02",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "5d148a6afe13db0ba0e7a83e0e355ff5b7d6e3e8",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "8650216d82e7713a0083377ebcc3a2af5978c8a8",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "efdf0ddaed01161dc1c1f25382856f2fd1c1f44f",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "cc448700db656cceb4b411bf99a2e7132144d035",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "95160fe606e685ff18de1e6ddcbc08289476004e",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "159dada48ee2d53eff46e66a8011d67b2c209bbc",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "ebe9b68c396792c15d0ac690d592e449e74ed804",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/cdns3/cdns3-gadget.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "lessThan": "5.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.273",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: cdns3: fix use-after-free in cdns3_gadget_exit()\n\ncdns3_gadget_start() arms two works on system_freezable_wq:\npending_status_wq for the deferred ep0 status stage and aligned_buf_wq\nfor realigned request buffers. Both handlers use the cdns3_device the\nworks are embedded in, and cdns3_pending_setup_status_handler() also\ncalls the ep0 request completion.\n\ncdns3_gadget_exit() does not wait for these works. It frees all\nendpoints and aligned buffers and drops the last reference to the\ngadget device, which frees priv_dev, so a work queued before the exit\ncan run after the free.\n\nFix this by waiting for both works after the gadget driver is unbound\nand the IRQ is freed, when no new work can be queued, and before the\nendpoints and buffers are released.\n\nThis issue was found by an in-house static analysis tool."
    }
  ],
  "id": "CVE-2026-98757",
  "lastModified": "2026-10-30T13:21:25.223",
  "metrics": {},
  "published": "2026-10-18T16:17:29.500",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/159dada48ee2d53eff46e66a8011d67b2c209bbc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5d148a6afe13db0ba0e7a83e0e355ff5b7d6e3e8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8650216d82e7713a0083377ebcc3a2af5978c8a8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/95160fe606e685ff18de1e6ddcbc08289476004e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a980a250de22bb4a487e935176d5f7a6b81f9a02"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cc448700db656cceb4b411bf99a2e7132144d035"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ebe9b68c396792c15d0ac690d592e449e74ed804"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/efdf0ddaed01161dc1c1f25382856f2fd1c1f44f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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