AUGUST 5, 2026
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Case File

CVE-2021-23975

MEDIUM · CVSS 6.5 EPSS 1.02%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-02-26 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 6.5. It affects Firefox.

CVE
CVE-2021-23975
Severity
MEDIUM
CVSS
6.5
EPSS
1.02%
Firefox

Original NVD Description

The developer page about:memory has a Measure function for exploring what object types the browser has allocated and their sizes. When this function was invoked we incorrectly called the sizeof function, instead of using the API method that checks for invalid pointers. This vulnerability affects Firefox < 86.

Related CVEs

Other vulnerabilities affecting the same vendor(s)