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Mozilla Firefox Use-After-Free Vulnerability

CISA lists this Mozilla Firefox vulnerability as known exploited. The vendor's advisory has the fixed versions.

CISA catalog record

Mozilla Firefox and Firefox ESR contain a use-after-free vulnerability in Animation timelines that allows for code execution in the content process.

Product
Firefox
Added to KEV
15 Oct 2024
Federal remediation due
5 Nov 2024
Known ransomware use
Yes

What changed

First observed 14 Oct 2026

No field changes in the recorded history.

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ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 14 Oct 12:55 UTC · 254 of 255 readable · 253 fully read · documentation 0/409 current