CVEvulnerability
CVE-2021-29945
6.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-06-24
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-682
Description
The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash. *Note: This issue only affected x86-32 platforms. Other platforms are unaffected.*. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
Affected configurations
• mozilla firefox (< 88.0)
• mozilla firefox esr (< 78.10)
• mozilla thunderbird (< 78.10)
Related
Weakness · CWE (1)
- CWE-682 Incorrect Calculation weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1700690 Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-14/ Release Notes, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-15/ Release Notes, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-16/ Release Notes, Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1700690 Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-14/ Release Notes, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-15/ Release Notes, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-16/ Release Notes, Vendor Advisory