CVE-2022-40957

Q: How do I fix CVE-2022-40957?

Published advisories record a fix for 9 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Q: Is CVE-2022-40957 being actively exploited?

Not that we know of. CVE-2022-40957 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.1% is the estimated probability that it will be exploited in the next 30 days. That is higher than 63% of all scored CVEs.

Q: How severe is CVE-2022-40957?

CVE-2022-40957 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2022-40957 affect?

Published advisories record a fix for thunderbird (Amazon), thunderbird-debuginfo (Amazon), firefox (Debian), firefox (Ubuntu), and 5 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUM

6.5

CVSS v3

NVD

Description

Inconsistent data in instruction and data cache when creating wasm code could lead to a potentially exploitable crash. *This bug only affects Firefox on ARM64 platforms.*. This vulnerability affects Firefox ESR < 102.3, Thunderbird < 102.3, and Firefox < 105.

CWE-240

How to fix

Remediation Available

thunderbirdAmazon

Fixed in:0:102.4.0-1.amzn2.0.1

thunderbird-debuginfoAmazon

Fixed in:0:102.4.0-1.amzn2.0.1

firefoxDebian

Fixed in:105.0-1CVE-2022-40957

firefoxUbuntu

Fixed in:105.0+build2-0ubuntu0.18.04.1USN-5649-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

Fixed in:105.0+build2-0ubuntu0.20.04.1USN-5649-1

This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.

thunderbirdUbuntu

Fixed in:1:102.4.2+build2-0ubuntu0.18.04.1USN-5724-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

Fixed in:1:102.4.2+build2-0ubuntu0.20.04.1USN-5724-1

This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.

Fixed in:1:102.4.2+build2-0ubuntu0.22.04.1USN-5724-1

Fixed in:1:102.4.2+build2-0ubuntu0.22.10.1USN-5724-1

This Ubuntu release reached end-of-life on 2023-07-20.

Firefox Developer Edition (en-US)Windows application

Affected:105.0Fixed in:105.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:105.0Fixed in:105.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:102.3Fixed in:102.3Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:102.3Fixed in:102.3Mozilla

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.08%probability of exploitation in 30 days

63rdpercentile

Moderate risk: more likely to be exploited than 63% of all known CVEs.

References

Vendor Advisory3

Issue Tracking1

bugzilla.mozilla.org

Related Vulnerabilities

Other CWE-240 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-31890	High	7.5	2.2%	-	Fix
CVE-2023-39914	High	7.5	0.7%	-	Fix
CVE-2023-39915	High	7.5	0.6%	-	Fix
CVE-2025-4321	High	7.1	0.2%	-	-

Common questions

How do I fix CVE-2022-40957?

Published advisories record a fix for 9 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2022-40957 being actively exploited?

Not that we know of. CVE-2022-40957 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.1% is the estimated probability that it will be exploited in the next 30 days. That is higher than 63% of all scored CVEs.

How severe is CVE-2022-40957?

CVE-2022-40957 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2022-40957 affect?

Published advisories record a fix for thunderbird (Amazon), thunderbird-debuginfo (Amazon), firefox (Debian), firefox (Ubuntu), and 5 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2022-40957

Markdown

[![CVE-2022-40957](https://tridentstack.com/cve/badge/CVE-2022-40957.svg)](https://tridentstack.com/cve/CVE-2022-40957)

HTML

<a href="https://tridentstack.com/cve/CVE-2022-40957"><img src="https://tridentstack.com/cve/badge/CVE-2022-40957.svg" alt="CVE-2022-40957"></a>

Check your Linux endpoints for this class of vulnerability

TridentStack Control continuously scans Linux endpoints for known vulnerabilities and deploys the fixes from the same console. 200 endpoints free forever, no credit card.

Patch your fleet free Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.