CVE-2023-21163

Status: ModifiedCritical (9.8)—

In PMR_ReadBytes of pmr.c, there is a possible arbitrary code execution due to a use after free. This could lead to local escalation of privilege in the kernel with no additional execution privileges needed. User interaction is not needed for exploitation.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base score: 9.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.41%
Percentile among all scored CVEs: 34
Score date: 10/10/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Google — Android

CWEs

NVD-CWE-noinfo

References

Raw JSON (NVD)

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{
  "id": "CVE-2023-21163",
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        "source": "nvd@nist.gov",
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          "version": "3.1",
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          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
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  "published": "2023-12-04T23:15:22.377",
  "references": [
    {
      "url": "https://source.android.com/security/bulletin/2023-12-01",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@android.com"
    },
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      "url": "https://source.android.com/security/bulletin/2023-12-01",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "weaknesses": [
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    },
    {
      "lang": "es",
      "value": "Hay elevación de privilegios."
    }
  ],
  "lastModified": "2026-06-17T05:31:58.903",
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}