CVE-2025-5272

Description

Memory safety bugs present in Firefox 138 and Thunderbird 138. 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 affects Firefox < 139.

Reserved 2025-05-27 | Published 2025-05-27 | Updated 2025-05-27 | Assigner mozilla

Problem types

Memory safety bugs fixed in Firefox 139 and Thunderbird 139

Product status

Any version before 139
affected

Credits

the Mozilla Fuzzing Team, Andrew Osmond

References

bugzilla.mozilla.org/...i?bug_id=1726254%2C1742738%2C1960121 (Memory safety bugs fixed in Firefox 139 and Thunderbird 139)

www.mozilla.org/security/advisories/mfsa2025-42/

cve.org (CVE-2025-5272)

nvd.nist.gov (CVE-2025-5272)

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