CVEvulnerability
CVE-2021-4129
9.8 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2022-12-22
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-787
Description
Mozilla developers and community members Julian Hector, Randell Jesup, Gabriele Svelto, Tyson Smith, Christian Holler, and Masayuki Nakano reported memory safety bugs present in Firefox 94. 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 < 95, Firefox ESR < 91.4.0, and Thunderbird < 91.4.0.
Affected configurations
• mozilla firefox (< 95.0)
• mozilla firefox esr (< 91.4.0)
• mozilla thunderbird (< 91.4.0)
Related
Weakness · CWE (1)
- CWE-787 Out-of-bounds Write weakness
References
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1393362%2C1736046%2C1736751%2C1737009%2C1739372%2C1739421 Exploit, Issue Tracking, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-52/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-53/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-54/ Vendor Advisory
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1393362%2C1736046%2C1736751%2C1737009%2C1739372%2C1739421 Exploit, Issue Tracking, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-52/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-53/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-54/ Vendor Advisory