Is CVE-2023-40414 in the CISA KEV catalog?

No. CVE-2023-40414 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-40414?

CVE-2023-40414 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2023-40414?

CVE-2023-40414 has an EPSS score of 1.04% (60th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-40414?

Upgrade webkit2gtk on debian 11 to 2.42.1-1~deb11u1 or later. Fixes are available for 32 affected products.

CVE & CISA-KEV Catalog

CVE-2023-40414

CRITICAL

9.8

CVSS v3

NVD

Description

A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 10, iOS 17 and iPadOS 17, tvOS 17, macOS Sonoma 14, Safari 17. Processing web content may lead to arbitrary code execution.

CWE-416Use After Free

How to fix

Remediation Available

webkit2gtkDebian

Fixed in:2.42.1-1~deb11u1CVE-2023-40414

Fixed in:2.42.1-1~deb12u1CVE-2023-40414

Fixed in:2.42.1-1CVE-2023-40414

webkit2gtk3Rocky

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3Red Hat / RHEL

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-debuginfoRocky

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-debuginfoRed Hat / RHEL

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-debugsourceRocky

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-debugsourceRed Hat / RHEL

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-develRed Hat / RHEL

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-develRocky

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-devel-debuginfoRocky

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-devel-debuginfoRed Hat / RHEL

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-jscRocky

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-jscRed Hat / RHEL

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-jsc-debuginfoRocky

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-jsc-debuginfoRed Hat / RHEL

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-jsc-develRed Hat / RHEL

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-jsc-develRocky

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-jsc-devel-debuginfoRocky

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkit2gtk3-jsc-devel-debuginfoRed Hat / RHEL

Fixed in:0:2.42.5-1.el8RHSA-2024:2982

Fixed in:0:2.42.5-1.el9RHSA-2024:2126

webkitgtk4Rocky

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4Red Hat / RHEL

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-debuginfoRocky

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-debuginfoRed Hat / RHEL

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-develRed Hat / RHEL

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-develRocky

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-docRocky

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-docRed Hat / RHEL

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-jscRed Hat / RHEL

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-jscRocky

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-jsc-develRocky

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-jsc-develRed Hat / RHEL

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

SafariWindows application

Affected:17.0Fixed in:17.0Apple Inc.

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 InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.04%probability of exploitation in 30 days

60thpercentile

Moderate risk: more likely to be exploited than 60% of all known CVEs.

References

Vendor Advisory5

Other references1

openwall.com

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	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 2025-06-20.