CVE-2026-63906 (GCVE-0-2026-63906)
Vulnerability from cvelistv5
Published
2026-07-19 14:55
Modified
2026-08-05 12:37
Severity ?
8.4 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: musb: omap2430: Fix use-after-free in omap2430_probe() In omap2430_probe(), of_node_put(np) is called prematurely before the last access to np, leading to a use-after-free if the node's reference count drops to zero. Move the of_node_put() calls after the last use of np in both the success and error paths.
References
Impacted products
Vendor Product Version
Linux Linux Version: 22b60658a90260e3fbd57824e3afe5682c6afcf5
Version: ffbe2feac59b37c8dc536727552b4f375e1b9aec
Version: ffbe2feac59b37c8dc536727552b4f375e1b9aec
Version: ffbe2feac59b37c8dc536727552b4f375e1b9aec
Version: ffbe2feac59b37c8dc536727552b4f375e1b9aec
Version: ffbe2feac59b37c8dc536727552b4f375e1b9aec
Version: fed43efc00ba6ac8c6b95828cd5acfa3d45eca4d
Version: 6.1.2   ≤
Version: 6.0.16   ≤
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/musb/omap2430.c"
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        {
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          "product": "Linux",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
              "version": "0",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
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            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.35",
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            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.1.2",
                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: musb: omap2430: Fix use-after-free in omap2430_probe()\n\nIn omap2430_probe(), of_node_put(np) is called prematurely before the\nlast access to np, leading to a use-after-free if the node\u0027s reference\ncount drops to zero. Move the of_node_put() calls after the last use of\nnp in both the success and error paths."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The UAF is reached only through local kernel driver probing (boot-time platform device enumeration, module load, or sysfs bind), not via network or USB packet handling. This is the highest defensible attack vector for this platform-driver probe bug.\nAC:L - Once probe runs on affected OMAP hardware, the premature of_node_put() deterministically frees the device_node before subsequent property/IRQ reads on the same pointer, with no race or attacker-uncontrollable timing required.\nPR:N - On OMAP3/OMAP4 systems with the driver built-in, the vulnerable probe path executes automatically at every boot without any software privileges; an attacker only needs the ability to power-cycle or reboot the device (e.g., a public OMAP kiosk or embedded controller).\nUI:N - Exploitation requires no victim interaction such as opening files or plugging in USB devices; the bug fires during kernel driver initialization on affected hardware.\nS:U - Impact is confined to kernel memory corruption and privilege boundaries within the host kernel; OMAP MUSB is an embedded SoC USB controller, not a hypervisor or cross-VM boundary.\nC:H - The use-after-free on a freed device_node structure allows reads of reallocated slab memory through of_property_read_u32() and of_parse_phandle(), enabling kernel information disclosure.\nI:H - UAF on the device_node heap object can corrupt kernel metadata and be leveraged for controlled writes or code execution through heap grooming during probe.\nA:H - Reading freed device_node memory during probe can cause kernel oops/panic and brick boot on OMAP systems, making the device unavailable until power-cycled or reflashed."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:37:01.876Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/632fd888fe33083927e29ef651ac1aba345edd9e"
        },
        {
          "url": "https://git.kernel.org/stable/c/b987f380620b38c84f054d5ff5c05861a7c2203b"
        },
        {
          "url": "https://git.kernel.org/stable/c/27e62532228dc42367bb43ebbcd7bf49d8db2b0d"
        },
        {
          "url": "https://git.kernel.org/stable/c/69f9f2b30af03d9b6e83f78fb0f734b6066d4678"
        },
        {
          "url": "https://git.kernel.org/stable/c/d53e4c41331f57b9fd78cbf3e480c6ce20aea07b"
        },
        {
          "url": "https://git.kernel.org/stable/c/e194ce048f5a6c549b3a23a8c568c6470f40f772"
        }
      ],
      "title": "usb: musb: omap2430: Fix use-after-free in omap2430_probe()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63906",
    "datePublished": "2026-07-19T14:55:12.982Z",
    "dateReserved": "2026-07-19T07:54:57.020Z",
    "dateUpdated": "2026-08-05T12:37:01.876Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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