cve-2021-47467
Vulnerability from cvelistv5
Published
2024-05-22 06:23
Modified
2024-11-05 15:29
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
kunit: fix reference count leak in kfree_at_end
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bbdd158b40b66a9403391a517f24ef6613573446
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f62314b1ced25c58b86e044fc951cd6a1ea234cf
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

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              "confidentialityImpact": "NONE",
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              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
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                "timestamp": "2024-05-22T15:53:40.956714Z",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkunit: fix reference count leak in kfree_at_end\n\nThe reference counting issue happens in the normal path of\nkfree_at_end(). When kunit_alloc_and_get_resource() is invoked, the\nfunction forgets to handle the returned resource object, whose refcount\nincreased inside, causing a refcount leak.\n\nFix this issue by calling kunit_alloc_resource() instead of\nkunit_alloc_and_get_resource().\n\nFixed the following when applying:\nShuah Khan \u003cskhan@linuxfoundation.org\u003e\n\nCHECK: Alignment should match open parenthesis\n+\tkunit_alloc_resource(test, NULL, kfree_res_free, GFP_KERNEL,\n \t\t\t\t     (void *)to_free);"
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    "datePublished": "2024-05-22T06:23:26.324Z",
    "dateReserved": "2024-05-22T06:20:56.198Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47467\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-22T07:15:11.533\",\"lastModified\":\"2024-11-05T16:35:02.863\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nkunit: fix reference count leak in kfree_at_end\\n\\nThe reference counting issue happens in the normal path of\\nkfree_at_end(). When kunit_alloc_and_get_resource() is invoked, the\\nfunction forgets to handle the returned resource object, whose refcount\\nincreased inside, causing a refcount leak.\\n\\nFix this issue by calling kunit_alloc_resource() instead of\\nkunit_alloc_and_get_resource().\\n\\nFixed the following when applying:\\nShuah Khan \u003cskhan@linuxfoundation.org\u003e\\n\\nCHECK: Alignment should match open parenthesis\\n+\\tkunit_alloc_resource(test, NULL, kfree_res_free, GFP_KERNEL,\\n \\t\\t\\t\\t     (void *)to_free);\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: kunit: corrige la fuga del recuento de referencias en kfree_at_end El problema del recuento de referencias ocurre en la ruta normal de kfree_at_end(). Cuando se invoca kunit_alloc_and_get_resource(), la funci\u00f3n se olvida de manejar el objeto de recurso devuelto, cuyo recuento aument\u00f3 en el interior, lo que provoca una fuga de recuento. Solucione este problema llamando a kunit_alloc_resource() en lugar de kunit_alloc_and_get_resource(). Se corrigi\u00f3 lo siguiente al aplicar: Shuah Khan  VERIFICAR: La alineaci\u00f3n debe coincidir con el par\u00e9ntesis abierto + kunit_alloc_resource(test, NULL, kfree_res_free, GFP_KERNEL, (void *)to_free);\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/bbdd158b40b66a9403391a517f24ef6613573446\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f62314b1ced25c58b86e044fc951cd6a1ea234cf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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