high 8.8

CVE-2023-32435 kev in the critical feed json

A memory corruption issue was addressed with improved state management.

published 2023-06-23 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-36679

cvss: 8.8; version 3.1, CNA
cisa kev: Exploited; added 2023-06-23
epss: 23.0%; EPSS 23.0% chance of exploitation in 30 days, percentile 97%
public exploits: 0; none known

A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Ventura 13.3, Safari 16.4, iOS 16.4 and iPadOS 16.4, iOS 15.7.7 and iPadOS 15.7.7. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited against versions of iOS released before iOS 15.7.

Patch / fix

cisa required action Apply updates per vendor instructions.

fixed in 3 distros 6

Apple macOS 13.3
Apple iOS and iPadOS 15.7, 16.4
Apple Safari 16.4

debian ubuntu red hat suse almalinux rocky linux

wpewebkit Debian 14, Debian 13 2.40.2-2
webkit2gtk Debian 14, Debian 13, Debian 12 2.40.0-1

debian advisories DEBIAN-CVE-2023-32435

webkit2gtk Ubuntu 22.04 LTS 2.40.4-0ubuntu0.22.04.1

ubuntu advisories UBUNTU-CVE-2023-32435

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 9 2.38.5-1.el9_2.3
webkit2gtk3-jsc RHEL 9 2.38.5-1.el9_2.3
webkit2gtk3 RHEL 8 2.38.5-1.el8_8.5
webkit2gtk3-jsc RHEL 8 2.38.5-1.el8_8.5
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-2025:10364 RHSA-2023:4201 RHSA-2023:4202

webkit2gtk3 SLE Module for Desktop Applications 15 SP5, SLE Module for Desktop Applications 15 SP4, openSUSE Leap 15.5 +1 more 2.40.5-150400.4.45.3
webkit2gtk4 SLE Module for Development Tools 15 SP5, SLE Module for Development Tools 15 SP4, openSUSE Leap 15.5 +1 more 2.40.5-150400.4.45.3
webkit2gtk3-soup2 SLE Module for Basesystem 15 SP5, SLE Module for Basesystem 15 SP4, openSUSE Leap 15.5 +1 more 2.40.5-150400.4.45.3
webkit2gtk3 SLES for SAP 12 SP5, SLES 12 SP5, SLES 12 SP2-BCL +2 more 2.40.5-2.146.1
webkit2gtk3 SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +7 more 2.40.5-150200.78.1
webkit2gtk3 SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS 2.40.5-150000.3.144.1

suse advisories SUSE-SU-2023:3419-1 SUSE-SU-2023:3300-1 SUSE-SU-2023:3237-1 SUSE-SU-2023:3233-1

webkit2gtk3 AlmaLinux 9 2.38.5-1.el9_2.3
webkit2gtk3-jsc AlmaLinux 9 2.38.5-1.el9_2.3
webkit2gtk3 AlmaLinux 8 2.38.5-1.el8_8.5.alma
webkit2gtk3-jsc AlmaLinux 8 2.38.5-1.el8_8.5.alma

almalinux advisories ALSA-2023:4201 ALSA-2023:4202

webkit2gtk3 Rocky Linux 9 2.38.5-1.el9_2.3
webkit2gtk3 Rocky Linux 8 2.38.5-1.el8_8.5

rocky linux advisories RLSA-2023:4201 RLSA-2023:4202

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-2023-32435 updated 2026-11-06 cvss 8.8

webkitgtk: memory corruption issue leading 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 2.38.5-1.el8_8.5, webkit2gtk3-jsc 2.38.5-1.el8_8.5
fixed: vendor fix RHSA-2023:4202
Red Hat Enterprise Linux AppStream (v. 9) webkit2gtk3 2.38.5-1.el9_2.3, webkit2gtk3-jsc 2.38.5-1.el9_2.3
fixed: vendor fix RHSA-2023:4201
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

Timeline

2023-06-21 0-day patched (Project Zero)
2023-06-23 Published
2023-06-23 Added to CISA KEV
2023-07-14 CISA patch deadline
2025-01-27 CISA SSVC: exploitation active

Known exploited

Added: 3 y ago (2023-06-23)
Patch by: 2023-07-14 (3 y ago)
Ransomware: Not known
Required action: Apply updates per vendor instructions.
Vendor, product: Apple, Multiple Products
CISA name: Apple Multiple Products WebKit Memory Corruption Vulnerability

Zero-day

Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.

Patched: 2023-06-21
Details: project zero tracker

CISA SSVC

Exploitation: Active, exploited in the wild
Automatable: no
Technical impact: total
Assessed: 21 mo ago (2025-01-27)

Exploit prediction

22.95% chance of exploitation in the next 30 days, higher than 97% 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
NVD	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 macOS
Apple iOS and iPadOS
Apple Safari

Classification

Weakness

CWE-787 Out-of-bounds Write

References

support.apple.com /en-us/HT213670
vendor-advisory
support.apple.com /en-us/HT213811
vendor-advisory
support.apple.com /en-us/HT213671
vendor-advisory
support.apple.com /en-us/HT213676
vendor-advisory
cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-32435
government-resource, us-government-resource

Sources

CVE List CVE-2023-32435
NVD CVE-2023-32435

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