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Fencer Vulns
critical 9.8

CVE-2023-40414 json

A use-after-free issue was addressed with improved memory management.

published 2024-01-10 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-44985

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

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.

Patch / fix

  • Apple iOS and iPadOS 17
  • Apple tvOS 17
  • Apple Safari 17
  • Apple macOS 14
  • Apple watchOS 10
  • wpewebkit Debian 14, Debian 13 2.42.1-1
  • webkit2gtk Debian 12 2.42.1-1~deb12u1
  • webkit2gtk Debian 14, Debian 13 2.42.1-1

debian advisories DEBIAN-CVE-2023-40414

  • webkit2gtk Ubuntu 22.04 LTS 2.42.1-0ubuntu0.22.04.1

ubuntu advisories UBUNTU-CVE-2023-40414

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • webkit2gtk3 RHEL 8 2.42.5-1.el8
  • webkit2gtk3-jsc RHEL 8 2.42.5-1.el8
  • webkit2gtk3 RHEL 9 2.42.5-1.el9
  • webkit2gtk3-jsc RHEL 9 2.42.5-1.el9
  • webkitgtk4 RHEL 7 ELS 2.48.3-2.el7_9
  • webkitgtk4-jsc RHEL 7 ELS 2.48.3-2.el7_9

red hat advisories RHSA-2025:10364RHSA-2024:2982RHSA-2024:2126

  • webkit2gtk3 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Module for Desktop Applications 15 SP5 +3 more 2.42.5-150400.4.75.1
  • webkit2gtk4 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Module for Development Tools 15 SP5 +3 more 2.42.5-150400.4.75.1
  • webkit2gtk3-soup2 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Module for Basesystem 15 SP5 +5 more 2.42.5-150400.4.75.1
  • webkit2gtk3 SLES for SAP 12 SP5, SLES 12 SP5, SLE Workstation Extension 12 SP5 +1 more 2.42.5-2.168.2
  • webkit2gtk3 SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +4 more 2.42.5-150200.104.1

suse advisories SUSE-SU-2024:0548-1SUSE-SU-2024:0545-1SUSE-SU-2024:0519-1

  • webkit2gtk3 AlmaLinux 8 2.42.5-1.el8
  • webkit2gtk3-jsc AlmaLinux 8 2.42.5-1.el8
  • webkit2gtk3 AlmaLinux 9 2.42.5-1.el9
  • webkit2gtk3-jsc AlmaLinux 9 2.42.5-1.el9

almalinux advisories ALSA-2024:2982ALSA-2024:2126

  • webkit2gtk3 Rocky Linux 8 2.42.5-1.el8

rocky linux advisories RLSA-2024:2982

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-40414 updated cvss 9.8

webkitgtk: Processing web content may lead to arbitrary code execution

  • Red Hat Enterprise Linux 6 webkitgtk
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 webkitgtk3, libwebkit2gtk
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3 2.42.5-1.el8, webkit2gtk3-jsc 2.42.5-1.el8
    fixed: vendor fix RHSA-2024:2982
  • Red Hat Enterprise Linux AppStream (v. 9) webkit2gtk3 2.42.5-1.el9, webkit2gtk3-jsc 2.42.5-1.el9
    fixed: vendor fix RHSA-2024:2126
  • Red Hat Enterprise Linux Server (v. 7 ELS) webkitgtk4 2.48.3-2.el7_9, webkitgtk4-jsc 2.48.3-2.el7_9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) webkitgtk4-doc 2.48.3-2.el7_9, webkitgtk4-devel 2.48.3-2.el7_9, webkitgtk4-debuginfo 2.48.3-2.el7_9, webkitgtk4-jsc-devel 2.48.3-2.el7_9
    fixed: vendor fix RHSA-2025:10364

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

1.15% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Apple iOS and iPadOS
  • Apple tvOS
  • Apple Safari
  • Apple macOS
  • Apple watchOS

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.