high 8.8

CVE-2023-42970 json

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

published 2025-04-11 18 mo ago modified 2026-06-17 4 mo ago also EUVD-2023-47391

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits: 0; none known

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

Patch / fix

fixed in 5 distros 6

Apple iOS and iPadOS 17
Apple macOS 14
Apple watchOS 10
Apple tvOS 17
Apple Safari 17

debian ubuntu red hat suse almalinux arch linux

wpewebkit Debian 14, Debian 13 2.42.0-1
webkit2gtk Debian 12 2.42.1-1~deb12u1
webkit2gtk Debian 14, Debian 13 2.42.0-1

debian advisories DEBIAN-CVE-2023-42970

webkit2gtk Ubuntu 22.04 LTS 2.42.1-0ubuntu0.22.04.1

ubuntu advisories UBUNTU-CVE-2023-42970

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
webkit2gtk3 RHEL 8.4 TUS, RHEL 8.4 E4S, RHEL 8.4 AUS 2.46.3-1.el8_4
webkit2gtk3-jsc RHEL 8.4 TUS, RHEL 8.4 E4S, RHEL 8.4 AUS 2.46.3-1.el8_4

red hat advisories RHSA-2025:10364 RHSA-2024:9679 RHSA-2024:9646 RHSA-2024:9680 RHSA-2024:9653 RHSA-2024:8496

webkit2gtk3 SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 2.48.2-150200.147.1
webkit2gtk3 SLE Module for Desktop Applications 15 SP7, SLE Module for Desktop Applications 15 SP6, openSUSE Leap 15.6 2.48.2-150600.12.40.2
webkit2gtk4 SLE Module for Development Tools 15 SP7, SLE Module for Development Tools 15 SP6, SLE Module for Basesystem 15 SP7 +2 more 2.48.2-150600.12.40.2
webkit2gtk3-soup2 SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.48.2-150600.12.40.2
webkit2gtk3 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 2.48.2-150400.4.119.1
webkit2gtk4 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 2.48.2-150400.4.119.1
webkit2gtk3-soup2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +7 more 2.48.2-150400.4.119.1
webkit2gtk3 SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 2.48.2-4.38.1

suse advisories SUSE-SU-2025:02033-1 SUSE-SU-2025:01746-1 SUSE-SU-2025:01724-1 SUSE-SU-2025:01720-1

webkit2gtk3 AlmaLinux 8 2.42.5-1.el8
webkit2gtk3-jsc AlmaLinux 8 2.42.5-1.el8

almalinux advisories ALSA-2024:2982

webkitgtk-6.0 Arch Linux 2.48.2-1
webkit2gtk-4.1 Arch Linux 2.48.2-1
wpewebkit Arch Linux 2.48.2-1

arch linux advisories AVG-2867 AVG-2868 AVG-2870

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-2023-42970 updated 2026-11-07 cvss 8.8

webkitgtk: Processing web content may lead to arbitrary code execution

Red Hat Enterprise Linux 6 webkitgtk
affected: workaround, no fix planned “Out of support scope”
Red Hat Enterprise Linux 7 webkitgtk3, libwebkit2gtk
affected: workaround, 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 AppStream AUS (v. 8.2) webkit2gtk3 2.46.3-1.el8_2, webkit2gtk3-jsc 2.46.3-1.el8_2
fixed: vendor fix RHSA-2024:9680
Red Hat Enterprise Linux AppStream AUS (v.8.4) webkit2gtk3 2.46.3-1.el8_4, webkit2gtk3-jsc 2.46.3-1.el8_4
fixed: vendor fix RHSA-2024:9679
Red Hat Enterprise Linux AppStream AUS (v.8.6) webkit2gtk3 2.46.3-1.el8_6, webkit2gtk3-jsc 2.46.3-1.el8_6
fixed: vendor fix RHSA-2024:9653
Red Hat Enterprise Linux AppStream E4S (v.8.4) webkit2gtk3 2.46.3-1.el8_4, webkit2gtk3-jsc 2.46.3-1.el8_4
fixed: vendor fix RHSA-2024:9679

show 7 more

Red Hat Enterprise Linux AppStream E4S (v.8.6) webkit2gtk3 2.46.3-1.el8_6, webkit2gtk3-jsc 2.46.3-1.el8_6
fixed: vendor fix RHSA-2024:9653
Red Hat Enterprise Linux AppStream E4S (v.9.0) webkit2gtk3 2.46.1-1.el9_0, webkit2gtk3-jsc 2.46.1-1.el9_0
fixed: vendor fix RHSA-2024:8496
Red Hat Enterprise Linux AppStream EUS (v.8.8) webkit2gtk3 2.46.3-1.el8_8, webkit2gtk3-jsc 2.46.3-1.el8_8
fixed: vendor fix RHSA-2024:9646
Red Hat Enterprise Linux AppStream EUS (v.9.2) webkit2gtk3 2.46.1-1.el9_2, webkit2gtk3-jsc 2.46.1-1.el9_2
fixed: vendor fix RHSA-2024:8492
Red Hat Enterprise Linux AppStream TUS (v.8.4) webkit2gtk3 2.46.3-1.el8_4, webkit2gtk3-jsc 2.46.3-1.el8_4
fixed: vendor fix RHSA-2024:9679
Red Hat Enterprise Linux AppStream TUS (v.8.6) webkit2gtk3 2.46.3-1.el8_6, webkit2gtk3-jsc 2.46.3-1.el8_6
fixed: vendor fix RHSA-2024:9653
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: 18 mo ago (2025-04-12)

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

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

Classification

Weakness

CWE-416 Use After Free

References

support.apple.com /en-us/120949
release-notes, vendor-advisory
support.apple.com /en-us/120950
release-notes, vendor-advisory
support.apple.com /en-us/120948
release-notes, vendor-advisory
support.apple.com /en-us/120947
release-notes, vendor-advisory
support.apple.com /en-us/120330
release-notes, vendor-advisory

Sources

CVE List CVE-2023-42970
NVD CVE-2023-42970

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.

Summary