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Description

Memory safety bugs present in Firefox 137 and Thunderbird 137. 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 138 and Thunderbird 138.

PUBLISHED Reserved 2025-04-29 | Published 2025-04-29 | Updated 2026-04-13 | Assigner mozilla

Product status

138 (rpm)
unaffected

138 (rpm)
unaffected

Credits

Randell Jesup, Jens Stutte, and the Mozilla Fuzzing Team

References

bugzilla.mozilla.org/...i?bug_id=1924108%2C1950780%2C1959367 (Memory safety bugs fixed in Firefox 138 and Thunderbird 138)

www.mozilla.org/security/advisories/mfsa2025-28/

www.mozilla.org/security/advisories/mfsa2025-31/

cve.org (CVE-2025-4092)

nvd.nist.gov (CVE-2025-4092)

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