CVE-2025-5268

Description

Memory safety bugs present in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10. 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 and Firefox ESR < 128.11.

Reserved 2025-05-27 | Published 2025-05-27 | Updated 2025-05-28 | Assigner mozilla

Problem types

Memory safety bugs fixed in Firefox 139, Thunderbird 139, Firefox ESR 128.11, and Thunderbird 128.11

Product status

Any version before 139
affected

Any version before 128.11
affected

Credits

the Mozilla Fuzzing Team, Masayuki Nakano

References

bugzilla.mozilla.org/...950136%2C1958121%2C1960499%2C1962634 (Memory safety bugs fixed in Firefox 139, Thunderbird 139, Firefox ESR 128.11, and Thunderbird 128.11)

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

www.mozilla.org/security/advisories/mfsa2025-44/

cve.org (CVE-2025-5268)

nvd.nist.gov (CVE-2025-5268)

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