cve-2021-47368
Vulnerability from cvelistv5
Published
2024-05-21 15:03
Modified
2024-11-04 12:04
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
enetc: Fix illegal access when reading affinity_hint
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4c4c3052911b577920353a7646e4883d5da40c28
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6c3f1b741c6c2914ea120e3a5790d3e900152f7b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6f329d9da2a5ae032fcde800a99b118124ed5270
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7237a494decfa17d0b9d0076e6cee3235719de90
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\nenetc: Fix illegal access when reading affinity_hint\n\nirq_set_affinity_hit() stores a reference to the cpumask_t\nparameter in the irq descriptor, and that reference can be\naccessed later from irq_affinity_hint_proc_show(). Since\nthe cpu_mask parameter passed to irq_set_affinity_hit() has\nonly temporary storage (it\u0027s on the stack memory), later\naccesses to it are illegal. Thus reads from the corresponding\nprocfs affinity_hint file can result in paging request oops.\n\nThe issue is fixed by the get_cpu_mask() helper, which provides\na permanent storage for the cpumask_t parameter."
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    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47368",
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    "dateReserved": "2024-05-21T14:58:30.810Z",
    "dateUpdated": "2024-11-04T12:04:35.269Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47368\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T15:15:22.773\",\"lastModified\":\"2024-07-03T01:37:46.787\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nenetc: Fix illegal access when reading affinity_hint\\n\\nirq_set_affinity_hit() stores a reference to the cpumask_t\\nparameter in the irq descriptor, and that reference can be\\naccessed later from irq_affinity_hint_proc_show(). Since\\nthe cpu_mask parameter passed to irq_set_affinity_hit() has\\nonly temporary storage (it\u0027s on the stack memory), later\\naccesses to it are illegal. Thus reads from the corresponding\\nprocfs affinity_hint file can result in paging request oops.\\n\\nThe issue is fixed by the get_cpu_mask() helper, which provides\\na permanent storage for the cpumask_t parameter.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: enetc: corrige el acceso ilegal al leer affinity_hint irq_set_affinity_hit() almacena una referencia al par\u00e1metro cpumask_t en el descriptor irq, y se puede acceder a esa referencia m\u00e1s tarde desde irq_affinity_hint_proc_show(). Dado que el par\u00e1metro cpu_mask pasado a irq_set_affinity_hit() solo tiene almacenamiento temporal (est\u00e1 en la memoria de la pila), los accesos posteriores a \u00e9l son ilegales. Por lo tanto, las lecturas del archivo procfs affinity_hint correspondiente pueden dar como resultado una solicitud de paginaci\u00f3n. El problema lo soluciona el asistente get_cpu_mask(), que proporciona un almacenamiento permanente para el par\u00e1metro cpumask_t.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":8.1,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.2}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-400\"}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4c4c3052911b577920353a7646e4883d5da40c28\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6c3f1b741c6c2914ea120e3a5790d3e900152f7b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6f329d9da2a5ae032fcde800a99b118124ed5270\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7237a494decfa17d0b9d0076e6cee3235719de90\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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}


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