Is CVE-2022-40957 in the CISA KEV catalog?

No. CVE-2022-40957 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-40957?

CVE-2022-40957 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2022-40957?

CVE-2022-40957 has an EPSS score of 1.08% (61th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-40957?

Upgrade firefox on debian unstable to 105.0-1 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2022-40957

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

firefoxDebian

Fixed in:105.0-1CVE-2022-40957

firefoxUbuntu

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

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

thunderbirdUbuntu

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

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

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

DeveloperEditionWindows 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

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

61stpercentile

Moderate risk: more likely to be exploited than 61% of all known CVEs.

References

Vendor Advisory3

Issue Tracking1

bugzilla.mozilla.org

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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 2025-04-15.