VulnerabilityModified
CVE-2021-29955
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.
MEDIUM 5.3EPSS 1.52%
Does this matter?
Lower severity and a low EPSS score (1.52%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
- EPSS
- 1.52% probability · 73th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-74
- Affected
- mozilla/firefox · mozilla/firefox esr
- Source
- security@mozilla.org
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1692972Permissions 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=1692972Permissions 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.