FKIE_CVE-2021-47537

Vulnerability from fkie_nvd - Published: 2024-05-24 15:15 - Updated: 2024-11-21 06:36
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: Fix a memleak bug in rvu_mbox_init() In rvu_mbox_init(), mbox_regions is not freed or passed out under the switch-default region, which could lead to a memory leak. Fix this bug by changing 'return err' to 'goto free_regions'. This bug was found by a static analyzer. The analysis employs differential checking to identify inconsistent security operations (e.g., checks or kfrees) between two code paths and confirms that the inconsistent operations are not recovered in the current function or the callers, so they constitute bugs. Note that, as a bug found by static analysis, it can be a false positive or hard to trigger. Multiple researchers have cross-reviewed the bug. Builds with CONFIG_OCTEONTX2_AF=y show no new warnings, and our static analyzer no longer warns about this code.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c0ddef45b7e3dbe3ed073695d20faa572b7056aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e07a097b4986afb8f925d0bb32612e1d3e88ce15Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1c0ddef45b7e3dbe3ed073695d20faa572b7056aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e07a097b4986afb8f925d0bb32612e1d3e88ce15Patch
Impacted products
Vendor Product Version
linux linux_kernel *
To clipboard 

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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6FE5F0C4-AE43-4DD0-ADAB-1090889867A3",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-af: Fix a memleak bug in rvu_mbox_init()\n\nIn rvu_mbox_init(), mbox_regions is not freed or passed out\nunder the switch-default region, which could lead to a memory leak.\n\nFix this bug by changing \u0027return err\u0027 to \u0027goto free_regions\u0027.\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_OCTEONTX2_AF=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: octeontx2-af: corrige un error de memleak en rvu_mbox_init() En rvu_mbox_init(), mbox_regions no se libera ni se pasa en la regi\u00f3n predeterminada del conmutador, lo que podr\u00eda provocar una p\u00e9rdida de memoria. Corrija este error cambiando \u0027return err\u0027 por \u0027goto free_regions\u0027. 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_OCTEONTX2_AF=y no muestran nuevas advertencias y nuestro analizador est\u00e1tico ya no advierte sobre este c\u00f3digo."
    }
  ],
  "id": "CVE-2021-47537",
  "lastModified": "2024-11-21T06:36:29.217",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2024-05-24T15:15:17.543",
  "references": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/e07a097b4986afb8f925d0bb32612e1d3e88ce15"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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