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8.8
Firefox Browser: Memory Bugs Can Crash or Run Malware
CVE-2026-3847
Summary
Some bugs in Firefox's memory management can cause the browser to crash or allow hackers to run malicious code on your computer. This issue affects all versions of Firefox before the latest update. To stay safe, make sure you're running the latest version of Firefox.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| mozilla | firefox | <= 148.0.2 | – |
Original title
Memory safety bugs present in Firefox 148.0.2. 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 arbitrar...
Original description
Memory safety bugs present in Firefox 148.0.2. 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 < 148.0.2.
nvd CVSS3.1
8.8
Vulnerability type
CWE-119
Buffer Overflow
CWE-416
Use After Free
Published: 10 Mar 2026 · Updated: 13 Mar 2026 · First seen: 11 Mar 2026