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9.8 Critical

CVE-2026-4729 Memory safety bugs present in Firefox 148 and Thunderbird 148

Description

Memory safety bugs present in Firefox 148 and Thunderbird 148. 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 149 and Thunderbird 149.

Affected products and versions

Product Affected versions Fixed in
Firefox 149 earliest → < 149 149
Thunderbird 149 earliest → < 149 149
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

References

Timeline

  1. Published
  2. Last modified

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