CVE-2018-12367

critical
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
9.5

Description

In the previous mitigations for Spectre, the resolution or precision of various methods was reduced to counteract the ability to measure precise time intervals. In that work PerformanceNavigationTiming was not adjusted but it was found that it could be used as a precision timer. This vulnerability affects Thunderbird < 60, Firefox ESR < 60.1, and Firefox < 61.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2018-12367

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2018-12367.html

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201806-14

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201808-8

OS impact

OSVersionStatusFixed in
arch archfixed60.0-1
suse slesaffected
debian debiansidfixed61.0-1
debian debianbookwormfixed1:60.0-1
debian debianbullseyefixed1:60.0-1
debian debianforkyfixed1:60.0-1
debian debiantrixiefixed1:60.0-1

References

Verify integrity in audit chain (admin only). AS-IS.