CVEvulnerability
CVE-2021-29955
5.3 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-06-24
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
- CVSS 2.0 ([email protected])
- 2.6 LOW — AV:N/AC:H/Au:N/C:P/I:N/A:N
- Weaknesses
- CWE-74
Description
A transient execution vulnerability, named Floating Point Value Injection (FPVI) allowed an attacker to leak arbitrary memory addresses and may have also enabled JIT type confusion attacks. (A related vulnerability, Speculative Code Store Bypass (SCSB), did not affect Firefox.). This vulnerability affects Firefox ESR < 78.9 and Firefox < 87.
Affected configurations
• mozilla firefox (< 87.0)
• mozilla firefox esr (< 78.9)
Related
Weakness · CWE (1)
- CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1692972 Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-10/ Release Notes, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-11/ Release Notes, Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1692972 Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-10/ Release Notes, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-11/ Release Notes, Vendor Advisory