Is CVE-2022-22738 in the CISA KEV catalog?

No. CVE-2022-22738 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-22738?

CVE-2022-22738 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2022-22738?

CVE-2022-22738 has an EPSS score of 1.00% (58th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-22738?

Upgrade firefox on debian unstable to 96.0-1 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2022-22738

HIGH

8.8

CVSS v3

NVD

Description

Applying a CSS filter effect could have accessed out of bounds memory. This could have lead to a heap-buffer-overflow causing a potentially exploitable crash. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

firefoxDebian

Fixed in:96.0-1CVE-2022-22738

firefoxUbuntu

Fixed in:96.0+build2-0ubuntu0.18.04.1USN-5229-1

Fixed in:96.0+build2-0ubuntu0.20.04.1USN-5229-1

thunderbirdUbuntu

Fixed in:1:91.5.0+build1-0ubuntu0.18.04.1USN-5248-1

Fixed in:1:91.5.0+build1-0ubuntu0.20.04.1USN-5248-1

DeveloperEditionWindows application

Affected:96.0Fixed in:96.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:96.0Fixed in:96.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:91.5Fixed in:91.5Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:91.5Fixed in:91.5Mozilla

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

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.00%probability of exploitation in 30 days

58thpercentile

Moderate risk: more likely to be exploited than 58% of all known CVEs.

References

Exploit1

bugzilla.mozilla.org

Vendor Advisory3

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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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 2025-04-16.