cve-2021-47528
Vulnerability from cvelistv5
Published
2024-05-24 15:09
Modified
2024-11-04 12:07
Severity ?
Summary
usb: cdnsp: Fix a NULL pointer dereference in cdnsp_endpoint_init()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/37307f7020ab38dde0892a578249bf63d00bca64Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d94bc8e335cb33918e52efdbe192c36707bfa24Patch
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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                "id": "CVE-2021-47528",
                "options": [
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                    "Exploitation": "none"
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                    "Automatable": "no"
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                  {
                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2024-06-17T17:34:41.402238Z",
                "version": "2.0.3"
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    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/cdns3/cdnsp-mem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: cdnsp: Fix a NULL pointer dereference in cdnsp_endpoint_init()\n\nIn cdnsp_endpoint_init(), cdnsp_ring_alloc() is assigned to pep-\u003ering\nand there is a dereference of it in cdnsp_endpoint_init(), which could\nlead to a NULL pointer dereference on failure of cdnsp_ring_alloc().\n\nFix this bug by adding a check of pep-\u003ering.\n\nThis bug was found by a static analyzer. The analysis employs\ndifferential checking to identify inconsistent security operations\n(e.g., checks or kfrees) between two code paths and confirms that the\ninconsistent operations are not recovered in the current function or\nthe callers, so they constitute bugs.\n\nNote that, as a bug found by static analysis, it can be a false\npositive or hard to trigger. Multiple researchers have cross-reviewed\nthe bug.\n\nBuilds with CONFIG_USB_CDNSP_GADGET=y show no new warnings,\nand our static analyzer no longer warns about this code."
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      "title": "usb: cdnsp: Fix a NULL pointer dereference in cdnsp_endpoint_init()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47528",
    "datePublished": "2024-05-24T15:09:39.357Z",
    "dateReserved": "2024-05-24T15:02:54.825Z",
    "dateUpdated": "2024-11-04T12:07:40.492Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47528\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-24T15:15:15.763\",\"lastModified\":\"2024-06-10T18:36:37.280\",\"vulnStatus\":\"Analyzed\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: cdnsp: Fix a NULL pointer dereference in cdnsp_endpoint_init()\\n\\nIn cdnsp_endpoint_init(), cdnsp_ring_alloc() is assigned to pep-\u003ering\\nand there is a dereference of it in cdnsp_endpoint_init(), which could\\nlead to a NULL pointer dereference on failure of cdnsp_ring_alloc().\\n\\nFix this bug by adding a check of pep-\u003ering.\\n\\nThis bug was found by a static analyzer. The analysis employs\\ndifferential checking to identify inconsistent security operations\\n(e.g., checks or kfrees) between two code paths and confirms that the\\ninconsistent operations are not recovered in the current function or\\nthe callers, so they constitute bugs.\\n\\nNote that, as a bug found by static analysis, it can be a false\\npositive or hard to trigger. Multiple researchers have cross-reviewed\\nthe bug.\\n\\nBuilds with CONFIG_USB_CDNSP_GADGET=y show no new warnings,\\nand our static analyzer no longer warns about this code.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: cdnsp: corrige una desreferencia de puntero NULL en cdnsp_endpoint_init() En cdnsp_endpoint_init(), cdnsp_ring_alloc() se asigna a pep-\u0026gt;ring y hay una desreferencia del mismo en cdnsp_endpoint_init( ), lo que podr\u00eda provocar una desreferencia del puntero NULL en caso de falla de cdnsp_ring_alloc(). Corrija este error agregando una marca de pep-\u0026gt;ring. Este error fue encontrado por un analizador est\u00e1tico. El an\u00e1lisis emplea verificaci\u00f3n diferencial para identificar operaciones de seguridad inconsistentes (por ejemplo, comprobaciones o kfrees) entre dos rutas de c\u00f3digo y confirma que las operaciones inconsistentes no se recuperan en la funci\u00f3n actual o en las personas que llaman, por lo que constituyen errores. Tenga en cuenta que, como error encontrado mediante an\u00e1lisis est\u00e1tico, puede ser un falso positivo o dif\u00edcil de activar. Varios investigadores han realizado una revisi\u00f3n cruzada del error. Las compilaciones con CONFIG_USB_CDNSP_GADGET=y no muestran nuevas advertencias y nuestro analizador est\u00e1tico ya no advierte sobre este c\u00f3digo.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"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\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.12\",\"versionEndExcluding\":\"5.15.7\",\"matchCriteriaId\":\"6FE5F0C4-AE43-4DD0-ADAB-1090889867A3\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/37307f7020ab38dde0892a578249bf63d00bca64\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7d94bc8e335cb33918e52efdbe192c36707bfa24\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
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