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CVE-2025-14326 is a use-after-free vulnerability in the Audio/Video: GMP (Gecko Media Plugin) component of Mozilla Firefox (prior to version 146) and Thunderbird (prior to version 146). The vulnerability arises when memory is freed but still referenced, potentially allowing an attacker to execute arbitrary code within the context of the affected application. The flaw is triggered during audio/video processing, likely due to improper lifecycle management of objects in the GMP component.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A use-after-free vulnerability in the Audio/Video component of Mozilla products, potentially allowing code execution or denial of service.
A use-after-free vulnerability in the Audio/Video: GMP component of Firefox, which could potentially allow an attacker to execute arbitrary code or cause a crash.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.