FKIE_CVE-2026-98756

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 NULL pointer dereference in cdns3_pci_probe The Cadence USBSS controller is a two-function PCI device. The first probed function allocates the driver data and stores it with pci_set_drvdata(), while the second function reuses it via pci_get_drvdata() when pci_is_enabled() reports that the first function has already been probed. When the second function is probed while the first one has been enabled but has not yet set its driver data, pci_get_drvdata() returns NULL, and the subsequent wrap->devfn assignment dereferences a NULL pointer and crashes the kernel. logs: Call trace: cdns3_pci_probe+0xa4/0x300 local_pci_probe+0x44/0xa8 pci_call_probe+0x54/0x158 pci_device_probe+0x84/0x100 really_probe+0x184/0x3d0 __driver_probe_device+0x80/0x178 driver_probe_device+0x44/0xe8 __driver_attach+0xec/0x1f8 bus_for_each_dev+0x7c/0xe0 driver_attach+0x28/0x38 bus_add_driver+0x110/0x238 driver_register+0x64/0x128 __pci_register_driver+0x50/0x60 cdns3_pci_driver_init+0x28/0x38 do_one_initcall+0x5c/0x280 do_initcalls+0x104/0x1d8 kernel_init_freeable+0x140/0x218 kernel_init+0x28/0x1f8 ret_from_fork+0x10/0x20 Return -EPROBE_DEFER in this case so that probing is retried after the first function has completed its probe.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/399b18b18f54495eeeda8d88e039e6af27d020c9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/45b606418bae73c7cde9f0e57e5b0977c816a7c0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/549c04df02f1bb5a10342f32e2c87f5d27c97279
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/88b473800ae11397e2e169aff2e17b041c040409
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d16046f1ace2691b6a946f022fe6dc215936880b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dbdd0ca9a7eac140697a366f698a0e2bb02a06a1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e5052f2c5c73c1dcca42bafc0bc737af2b2af059
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fc13243658da9ed3c4c94aaff77c36a10f441b89
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/cdns3/cdns3-pci-wrap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "399b18b18f54495eeeda8d88e039e6af27d020c9",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "88b473800ae11397e2e169aff2e17b041c040409",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "fc13243658da9ed3c4c94aaff77c36a10f441b89",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "dbdd0ca9a7eac140697a366f698a0e2bb02a06a1",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "549c04df02f1bb5a10342f32e2c87f5d27c97279",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "d16046f1ace2691b6a946f022fe6dc215936880b",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "45b606418bae73c7cde9f0e57e5b0977c816a7c0",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            },
            {
              "lessThan": "e5052f2c5c73c1dcca42bafc0bc737af2b2af059",
              "status": "affected",
              "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/cdns3/cdns3-pci-wrap.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 NULL pointer dereference in cdns3_pci_probe\n\nThe Cadence USBSS controller is a two-function PCI device. The first\nprobed function allocates the driver data and stores it with\npci_set_drvdata(), while the second function reuses it via\npci_get_drvdata() when pci_is_enabled() reports that the first\nfunction has already been probed.\n\nWhen the second function is probed while the first one has been\nenabled but has not yet set its driver data, pci_get_drvdata()\nreturns NULL, and the subsequent wrap-\u003edevfn assignment dereferences\na NULL pointer and crashes the kernel.\nlogs:\nCall trace:\n  cdns3_pci_probe+0xa4/0x300\n  local_pci_probe+0x44/0xa8\n  pci_call_probe+0x54/0x158\n  pci_device_probe+0x84/0x100\n  really_probe+0x184/0x3d0\n  __driver_probe_device+0x80/0x178\n  driver_probe_device+0x44/0xe8\n  __driver_attach+0xec/0x1f8\n  bus_for_each_dev+0x7c/0xe0\n  driver_attach+0x28/0x38\n  bus_add_driver+0x110/0x238\n  driver_register+0x64/0x128\n  __pci_register_driver+0x50/0x60\n  cdns3_pci_driver_init+0x28/0x38\n  do_one_initcall+0x5c/0x280\n  do_initcalls+0x104/0x1d8\n  kernel_init_freeable+0x140/0x218\n  kernel_init+0x28/0x1f8\n  ret_from_fork+0x10/0x20\n\nReturn -EPROBE_DEFER in this case so that probing is retried after\nthe first function has completed its probe."
    }
  ],
  "id": "CVE-2026-98756",
  "lastModified": "2026-10-30T13:21:25.080",
  "metrics": {},
  "published": "2026-10-18T16:17:29.397",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/399b18b18f54495eeeda8d88e039e6af27d020c9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/45b606418bae73c7cde9f0e57e5b0977c816a7c0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/549c04df02f1bb5a10342f32e2c87f5d27c97279"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/88b473800ae11397e2e169aff2e17b041c040409"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d16046f1ace2691b6a946f022fe6dc215936880b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dbdd0ca9a7eac140697a366f698a0e2bb02a06a1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e5052f2c5c73c1dcca42bafc0bc737af2b2af059"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fc13243658da9ed3c4c94aaff77c36a10f441b89"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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