A use-after-free vulnerability can occur when the thread for a Web Worker is freed from memory prematurely instead of from memory in the main thread while cancelling fetch operations. This vulnerability affects Firefox < 58.
https://usn.ubuntu.com/3544-1/
http://www.securitytracker.com/id/1040270
http://www.securityfocus.com/bid/102786
https://www.mozilla.org/security/advisories/mfsa2018-02/
https://bugzilla.mozilla.org/show_bug.cgi?id=1418074
Source: Mitre, NVD
Published: 2018-06-11
Updated: 2024-11-21
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical
EPSS: 0.0447