CVE-2025-3031

JIT optimization bug with different stack slot sizes

State: Published
Severity: 6.5 Medium
Published: Apr 1, 2025
Updated: Apr 13, 2026
Reserved: Mar 31, 2025

Description

An attacker could read 32 bits of values spilled onto the stack in a JIT compiled function. This vulnerability was fixed in Firefox 137 and Thunderbird 137.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	CISA-ADP

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected Products

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

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1947141
https://www.mozilla.org/security/advisories/mfsa2025-20/
https://www.mozilla.org/security/advisories/mfsa2025-23/

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