CVE-2018-5092

moderate-risk
Published 2018-06-11

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.

Do I need to act?

~
1.8% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (4)

Affected Vendors

Mozilla Canonical

References (10)

Third Party Advisory http://www.securityfocus.com/bid/102786
Third Party Advisory http://www.securitytracker.com/id/1040270
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1418074
Third Party Advisory https://usn.ubuntu.com/3544-1/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2018-02/
Third Party Advisory http://www.securityfocus.com/bid/102786
Third Party Advisory http://www.securitytracker.com/id/1040270
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1418074
Third Party Advisory https://usn.ubuntu.com/3544-1/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2018-02/
47
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 5/34 · Minimal
Exposure 10/34 · Low