7.5
High
CVE-2026-6784 Memory safety bugs present in Firefox 149 and Thunderbird 149
Description
Memory safety bugs present in Firefox 149 and Thunderbird 149. 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 was fixed in Firefox 150 and Thunderbird 150.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 150 | earliest → < 150 | 150 |
| Thunderbird 150 | earliest → < 150 | 150 |
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 6 | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published |
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