CVE-2021-23975

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

Product

Mozilla Firefox

PublishedFeb 26, 2021

First seenFeb 26, 2021

How to fix

Update

mozilla firefox86.0 or later

Vendor advisories

security.gentoo.org/glsa/202104-10

Affected products

Product	Affected versions	Fixed in
mozilla firefox	v < 86.0	86.0

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