CVE-2025-3034

Memory safety bugs fixed in Firefox 137 and Thunderbird 137

State: Published
Severity: 8.1 High
Published: Apr 1, 2025
Updated: Apr 13, 2026
Reserved: Mar 31, 2025

Description

Memory safety bugs present in Firefox 136 and Thunderbird 136. 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 137 and Thunderbird 137.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
FirefoxMozilla	137 and laterNot affected
ThunderbirdMozilla	137 and laterNot affected

References

Memory safety bugs fixed in Firefox 137 and Thunderbird 137
https://www.mozilla.org/security/advisories/mfsa2025-20/
https://www.mozilla.org/security/advisories/mfsa2025-23/

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