cve-2021-47541
Vulnerability from cvelistv5
Published
2024-05-24 15:09
Modified
2024-11-04 12:07
Severity ?
EPSS score ?
Summary
net/mlx4_en: Fix an use-after-free bug in mlx4_en_try_alloc_resources()
References
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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_MLX4_EN=m 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: net/mlx4_en: corrige un error de use-after-free en mlx4_en_try_alloc_resources() En mlx4_en_try_alloc_resources(), se llama a mlx4_en_copy_priv() y se liberar\u00e1 tmp-\u0026gt;tx_cq en la ruta del error de mlx4_en_copy_priv(). Despu\u00e9s de eso, se llama a mlx4_en_alloc_resources() y hay una desreferencia de \u0026amp;tmp-\u0026gt;tx_cq[t][i] en mlx4_en_alloc_resources(), lo que podr\u00eda llevar a un problema de use-after-free si falla mlx4_en_copy_priv(). Corrija este error agregando una verificaci\u00f3n de mlx4_en_copy_priv() 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. 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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.