CVE-2026-63906 (GCVE-0-2026-63906)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-08-05 12:37
VLAI
Title
usb: musb: omap2430: Fix use-after-free in omap2430_probe()
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.
Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 22b60658a90260e3fbd57824e3afe5682c6afcf5 , < 632fd888fe33083927e29ef651ac1aba345edd9e (git)
Affected: ffbe2feac59b37c8dc536727552b4f375e1b9aec , < b987f380620b38c84f054d5ff5c05861a7c2203b (git)
Affected: ffbe2feac59b37c8dc536727552b4f375e1b9aec , < 27e62532228dc42367bb43ebbcd7bf49d8db2b0d (git)
Affected: ffbe2feac59b37c8dc536727552b4f375e1b9aec , < 69f9f2b30af03d9b6e83f78fb0f734b6066d4678 (git)
Affected: ffbe2feac59b37c8dc536727552b4f375e1b9aec , < d53e4c41331f57b9fd78cbf3e480c6ce20aea07b (git)
Affected: ffbe2feac59b37c8dc536727552b4f375e1b9aec , < e194ce048f5a6c549b3a23a8c568c6470f40f772 (git)
Affected: fed43efc00ba6ac8c6b95828cd5acfa3d45eca4d (git)
Affected: 6.1.2 , < 6.1.176 (semver)
Affected: 6.0.16 , < 6.1 (semver)
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Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (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)
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{
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          "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."
        }
      ],
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            "baseSeverity": "HIGH",
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            "version": "3.1"
          },
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              "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."
            }
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      "providerMetadata": {
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      "title": "usb: musb: omap2430: Fix use-after-free in omap2430_probe()",
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    "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"
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            "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."
          }
        ],
        "id": "CVE-2026-63906",
        "lastModified": "2026-07-27T17:44:23.777",
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                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
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      "current_release_date": "2026-07-21T21:09:35+00:00",
      "cve": "CVE-2026-63906",
      "id": "CVE-2026-63906",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_not_affected": "275",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb: musb: omap2430: Fix use-after-free in omap2430_probe()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63906.json",
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      "current_release_date": "2026-07-28T17:09:52Z",
      "cve": "CVE-2026-63906",
      "id": "CVE-2026-63906",
      "initial_release_date": "2026-07-21T13:03:50Z",
      "product_status:known_not_affected": "298",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-63906",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-63906.json",
      "version": "4"
    }
  }
}



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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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