CVE-2021-38498

HIGH

Firefox < 93, Thunderbird < 91.2, Firefox ESR < 91.2 - Use After Free

Title source: llm
STIX 2.1

Description

During process shutdown, a document could have caused a use-after-free of a languages service object, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2.

References (4)

Core 4
Core References
Permissions Required, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1729642

Scores

CVSS v3 7.5
EPSS 0.0070
EPSS Percentile 72.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-416
Status published
Products (3)
mozilla/firefox < 93.0
mozilla/firefox_esr < 91.2
mozilla/thunderbird < 91.2
Published Nov 03, 2021
Tracked Since Feb 18, 2026