CVE-2022-45406

Name: CVE-2022-45406
Creator: NVD / NIST
Published: 2022-12-22T20:15:42.197+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.06%

Last modified Jun 17, 2026

CVE-2022-45406 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. If an out-of-memory condition occurred when creating a JavaScript global, a JavaScript realm may be deleted while references to it lived on in a BaseShape. This could lead to a use-after-free causing a potentially exploitable crash. EPSS estimates a 1.06% chance of exploitation in the next 30 days.

Description

If an out-of-memory condition occurred when creating a JavaScript global, a JavaScript realm may be deleted while references to it lived on in a BaseShape. This could lead to a use-after-free causing a potentially exploitable crash. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.06%

60.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 107.0
Mozilla	Firefox Esr	< 102.5
Mozilla	Thunderbird	< 102.5

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1791975Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-47/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-48/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-49/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1791975Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-47/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-48/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-49/Vendor Advisory

Timeline

Published: Dec 22, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-45406?

How severe is CVE-2022-45406?

CVE-2022-45406 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.06% probability of exploitation in the next 30 days.

How do I fix CVE-2022-45406?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-45406?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST