Vulnerability Description
Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6. 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 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 128.7.0 |
| Mozilla | Thunderbird | >= 128.0.1, < 128.7.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1926256%2C1935984%2C1935471Broken Link
- https://www.mozilla.org/security/advisories/mfsa2025-07/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-09/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-10/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-11/Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html
FAQ
What is CVE-2025-1017?
CVE-2025-1017 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort som...
How severe is CVE-2025-1017?
CVE-2025-1017 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-1017?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Thunderbird.