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CVE-2022-38477

Status: ModifiedHigh (8.8)—

Mozilla developer Nika Layzell and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 103 and Firefox ESR 102.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 102.2, Thunderbird < 102.2, and Firefox < 104.

CVSS

Exploitation probability (EPSS)

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 (3)

Mozilla — FirefoxMozilla — Firefox ESRMozilla — Thunderbird

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2022-38477",
  "cveTags": [],
  "metrics": {
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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            {
              "automatable": "no"
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            {
              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2025-04-15T17:21:30.476502Z"
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          "userInteraction": "REQUIRED",
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  "affected": [
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          "vendor": "Mozilla",
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  ],
  "published": "2022-12-22T20:15:37.380",
  "references": [
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      "url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1760611%2C1770219%2C1771159%2C1773363",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-787"
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      "lang": "en",
      "value": "Mozilla developer Nika Layzell and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 103 and Firefox ESR 102.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 102.2, Thunderbird < 102.2, and Firefox < 104."
    },
    {
      "lang": "es",
      "value": "La desarrolladora de Mozilla, Nika Layzell, y el equipo Mozilla Fuzzing informaron errores de seguridad de la memoria presentes en Firefox 103 y Firefox ESR 102.1. Algunos de estos errores mostraron evidencia de corrupción de memoria y suponemos que con suficiente esfuerzo algunos de ellos podrían haberse aprovechado para ejecutar código arbitrario. Esta vulnerabilidad afecta a Firefox ESR &lt; 102.2, Thunderbird &lt; 102.2 y Firefox &lt; 104."
    }
  ],
  "lastModified": "2026-06-17T04:56:42.827",
  "configurations": [
    {
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