CVE-2025-4919

Summary

An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.

Affected Software

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

CVE Program Container

Additional References

• https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html
• https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1966614
• https://www.mozilla.org/security/advisories/mfsa2025-36/
• https://www.mozilla.org/security/advisories/mfsa2025-37/
• https://www.mozilla.org/security/advisories/mfsa2025-38/
• https://www.mozilla.org/security/advisories/mfsa2025-40/
• https://www.mozilla.org/security/advisories/mfsa2025-41/

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