cve-2023-52855
Vulnerability from cvelistv5
Published
2024-05-21 15:31
Modified
2024-11-05 14:51
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
usb: dwc2: fix possible NULL pointer dereference caused by driver concurrency
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/14c9ec34e8118fbffd7f5431814d767726323e72
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3e851a77a13ce944d703721793f49ee82622986d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/64c47749fc7507ed732e155c958253968c1d275e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6b21a22728852d020a6658d39cd7bb7e14b07790
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a7bee9598afb38004841a41dd8fe68c1faff4e90
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bdb3dd4096302d6b87441fdc528439f171b04be6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef307bc6ef04e8c1ea843231db58e3afaafa9fa6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fcaafb574fc88a52dce817f039f7ff2f9da38001
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fed492aa6493a91a77ebd51da6fb939c98d94a0d
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc2: fix possible NULL pointer dereference caused by driver concurrency\n\nIn _dwc2_hcd_urb_enqueue(), \"urb-\u003ehcpriv = NULL\" is executed without\nholding the lock \"hsotg-\u003elock\". In _dwc2_hcd_urb_dequeue():\n\n    spin_lock_irqsave(\u0026hsotg-\u003elock, flags);\n    ...\n\tif (!urb-\u003ehcpriv) {\n\t\tdev_dbg(hsotg-\u003edev, \"## urb-\u003ehcpriv is NULL ##\\n\");\n\t\tgoto out;\n\t}\n    rc = dwc2_hcd_urb_dequeue(hsotg, urb-\u003ehcpriv); // Use urb-\u003ehcpriv\n    ...\nout:\n    spin_unlock_irqrestore(\u0026hsotg-\u003elock, flags);\n\nWhen _dwc2_hcd_urb_enqueue() and _dwc2_hcd_urb_dequeue() are\nconcurrently executed, the NULL check of \"urb-\u003ehcpriv\" can be executed\nbefore \"urb-\u003ehcpriv = NULL\". After urb-\u003ehcpriv is NULL, it can be used\nin the function call to dwc2_hcd_urb_dequeue(), which can cause a NULL\npointer dereference.\n\nThis possible bug is found by an experimental static analysis tool\ndeveloped by myself. This tool analyzes the locking APIs to extract\nfunction pairs that can be concurrently executed, and then analyzes the\ninstructions in the paired functions to identify possible concurrency\nbugs including data races and atomicity violations. The above possible\nbug is reported, when my tool analyzes the source code of Linux 6.5.\n\nTo fix this possible bug, \"urb-\u003ehcpriv = NULL\" should be executed with\nholding the lock \"hsotg-\u003elock\". After using this patch, my tool never\nreports the possible bug, with the kernelconfiguration allyesconfig for\nx86_64. Because I have no associated hardware, I cannot test the patch\nin runtime testing, and just verify it according to the code logic."
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    "datePublished": "2024-05-21T15:31:49.909Z",
    "dateReserved": "2024-05-21T15:19:24.257Z",
    "dateUpdated": "2024-11-05T14:51:47.408Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52855\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T16:15:22.453\",\"lastModified\":\"2024-11-05T15:35:04.893\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: dwc2: fix possible NULL pointer dereference caused by driver concurrency\\n\\nIn _dwc2_hcd_urb_enqueue(), \\\"urb-\u003ehcpriv = NULL\\\" is executed without\\nholding the lock \\\"hsotg-\u003elock\\\". In _dwc2_hcd_urb_dequeue():\\n\\n    spin_lock_irqsave(\u0026hsotg-\u003elock, flags);\\n    ...\\n\\tif (!urb-\u003ehcpriv) {\\n\\t\\tdev_dbg(hsotg-\u003edev, \\\"## urb-\u003ehcpriv is NULL ##\\\\n\\\");\\n\\t\\tgoto out;\\n\\t}\\n    rc = dwc2_hcd_urb_dequeue(hsotg, urb-\u003ehcpriv); // Use urb-\u003ehcpriv\\n    ...\\nout:\\n    spin_unlock_irqrestore(\u0026hsotg-\u003elock, flags);\\n\\nWhen _dwc2_hcd_urb_enqueue() and _dwc2_hcd_urb_dequeue() are\\nconcurrently executed, the NULL check of \\\"urb-\u003ehcpriv\\\" can be executed\\nbefore \\\"urb-\u003ehcpriv = NULL\\\". After urb-\u003ehcpriv is NULL, it can be used\\nin the function call to dwc2_hcd_urb_dequeue(), which can cause a NULL\\npointer dereference.\\n\\nThis possible bug is found by an experimental static analysis tool\\ndeveloped by myself. This tool analyzes the locking APIs to extract\\nfunction pairs that can be concurrently executed, and then analyzes the\\ninstructions in the paired functions to identify possible concurrency\\nbugs including data races and atomicity violations. The above possible\\nbug is reported, when my tool analyzes the source code of Linux 6.5.\\n\\nTo fix this possible bug, \\\"urb-\u003ehcpriv = NULL\\\" should be executed with\\nholding the lock \\\"hsotg-\u003elock\\\". After using this patch, my tool never\\nreports the possible bug, with the kernelconfiguration allyesconfig for\\nx86_64. Because I have no associated hardware, I cannot test the patch\\nin runtime testing, and just verify it according to the code logic.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: dwc2: corrige posible desreferencia de puntero NULL causada por concurrencia de controladores. En _dwc2_hcd_urb_enqueue(), \\\"urb-\u0026gt;hcpriv = NULL\\\" se ejecuta sin mantener presionado el bloqueo \\\"hsotg-\u0026gt;lock\\\" . En _dwc2_hcd_urb_dequeue(): spin_lock_irqsave(\u0026amp;hsotg-\u0026gt;lock, flags); ... if (!urb-\u0026gt;hcpriv) { dev_dbg(hsotg-\u0026gt;dev, \\\"## urb-\u0026gt;hcpriv es NULL ##\\\\n\\\"); salir; } rc = dwc2_hcd_urb_dequeue(hsotg, urb-\u0026gt;hcpriv); // Usa urb-\u0026gt;hcpriv ... out: spin_unlock_irqrestore(\u0026amp;hsotg-\u0026gt;lock, flags); Cuando _dwc2_hcd_urb_enqueue() y _dwc2_hcd_urb_dequeue() se ejecutan simult\u00e1neamente, la verificaci\u00f3n NULL de \\\"urb-\u0026gt;hcpriv\\\" se puede ejecutar antes de \\\"urb-\u0026gt;hcpriv = NULL\\\". Despu\u00e9s de que urb-\u0026gt;hcpriv sea NULL, se puede usar en la llamada de funci\u00f3n a dwc2_hcd_urb_dequeue(), lo que puede provocar una desreferencia del puntero NULL. 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Como no tengo hardware asociado, no puedo probar el parche en tiempo de ejecuci\u00f3n y simplemente verificarlo de acuerdo con la l\u00f3gica del c\u00f3digo.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/14c9ec34e8118fbffd7f5431814d767726323e72\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3e851a77a13ce944d703721793f49ee82622986d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/64c47749fc7507ed732e155c958253968c1d275e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6b21a22728852d020a6658d39cd7bb7e14b07790\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a7bee9598afb38004841a41dd8fe68c1faff4e90\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bdb3dd4096302d6b87441fdc528439f171b04be6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ef307bc6ef04e8c1ea843231db58e3afaafa9fa6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fcaafb574fc88a52dce817f039f7ff2f9da38001\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fed492aa6493a91a77ebd51da6fb939c98d94a0d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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}


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