Description
A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
References (7)
Core 7
Core References
Third Party Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-18/
Third Party Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-16/
Third Party Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-17/
Issue Tracking, Permissions Required x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1545345
Broken Link vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4373-1/
Third Party Advisory x_refsource_misc
https://security.gentoo.org/glsa/202005-03
Third Party Advisory x_refsource_misc
https://security.gentoo.org/glsa/202005-04
Scores
CVSS v3
8.1
EPSS
0.0100
EPSS Percentile
77.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-362
CWE-416
Status
published
Products (3)
mozilla/firefox
< 76.0
mozilla/firefox_esr
< 68.8.0
mozilla/thunderbird
< 68.8.0
Published
May 26, 2020
Tracked Since
Feb 18, 2026