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CVE-2020-15678

Status: ModifiedHigh (8.8)—

When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free. This occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.

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 (5)

Debian — Debian LinuxMozilla — FirefoxMozilla — Firefox ESRMozilla — ThunderbirdOpensuse — Leap

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2020-15678",
  "cveTags": [],
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      "value": "When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free. This occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3."
    },
    {
      "lang": "es",
      "value": "Al volver a recorrer las capas gráficas mientras se desplaza, es posible que un iterador pueda convertirse en no válido, resultando en un potencial uso de la memoria previamente liberada.&#xa0;Esto ocurre porque la función APZCTreeManager::ComputeClippedCompositionBounds no siguió las reglas de invalidación del iterador.&#xa0;Esta vulnerabilidad afecta a Firefox versiones anteriores a 81, Thunderbird versiones anteriores a 78.3, y Firefox ESR versiones anteriores a 78.3"
    }
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  "lastModified": "2026-06-17T02:57:02.200",
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