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CVE-2021-29955

nvd nist
Published: Jun 24, 2021Modified: Jun 17, 2026

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5.3
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Exploitability: 1.6 / Impact: 3.6
Source: NVD

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 (2)

Mozilla
2 products
Firefox
Firefox Esr
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Firefox
Before 87.0
Firefox Esr
Before 78.9

Related CWEs

CWE-74
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

References (6)

Source: security@mozilla.org
Permissions RequiredVendor Advisory
Source: security@mozilla.org
Release NotesVendor Advisory
Source: security@mozilla.org
Release NotesVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Permissions RequiredVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Release NotesVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Release NotesVendor Advisory

Timeline

No history available yet.