fkie_cve-2021-20219
Vulnerability from fkie_nvd
Published
2021-03-23 17:15
Modified
2024-11-21 05:46
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
A denial of service vulnerability was found in n_tty_receive_char_special in drivers/tty/n_tty.c of the Linux kernel. In this flaw a local attacker with a normal user privilege could delay the loop (due to a changing ldata->read_head, and a missing sanity check) and cause a threat to the system availability.
References
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1923738Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1923738Issue Tracking, Third Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel *


To clipboard 

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  "descriptions": [
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      "value": "A denial of service vulnerability was found in n_tty_receive_char_special in drivers/tty/n_tty.c of the Linux kernel. In this flaw a local attacker with a normal user privilege could delay the loop (due to a changing ldata-\u003eread_head, and a missing sanity check) and cause a threat to the system availability."
    },
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      "value": "Se encontr\u00f3 una vulnerabilidad de denegaci\u00f3n de servicio en la funci\u00f3n n_tty_receive_char_special en el archivo drivers/tty/n_tty.c del kernel de Linux.\u0026#xa0;En este fallo, un atacante local con un privilegio de usuario normal podr\u00eda retrasar el ciclo (debido a un cambio de ldata-)read_head, y una falta de comprobaci\u00f3n de saneamiento) y causar una amenaza a la disponibilidad del sistema"
    }
  ],
  "id": "CVE-2021-20219",
  "lastModified": "2024-11-21T05:46:09.267",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 2.1,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
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        "obtainUserPrivilege": false,
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  "published": "2021-03-23T17:15:13.607",
  "references": [
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      "source": "secalert@redhat.com",
      "tags": [
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1923738"
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  "vulnStatus": "Modified",
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