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CVE-2023-32439: Apple Multiple Products WebKit Type Confusion Vulnerability

80
Patch now
HIGH 8.8EXPLOITEDUPGRADEUPGRADEUPGRADE

CVE-2023-32439 is a high-severity flaw (CVSS 8.8) affecting safari, ipados, iphone os, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A type confusion issue was addressed with improved checks. This issue is fixed in iOS 16.5.1 and iPadOS 16.5.1, iOS 15.7.7 and iPadOS 15.7.7, macOS Ventura 13.4.1, Safari 16.5.1. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

Why this priority

  • High severity
  • EPSS top 2%: very likely to be exploited
  • Exploited in the wild (CISA KEV)

A fixed release or distro patch exists.

Risk facts

CVSS score8.8 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance24.0% (top 2%)
CISA exploited listYes, fix due 2023-07-14
WeaknessCWE-843
Published2023-06-23
Last modified2026-06-17
Publisher (CNA): Apple Inc. · Vendor: apple · webkitgtk

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

apple safari UPGRADE
Affected: < 16.5.1
Fixed in: 16.5.1
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy safari || rpm -q safari || safari --version
2. UPGRADE to 16.5.1 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade safari
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade safari
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
apple ipados UPGRADE
Affected: < 15.7.7 · >= 16.0 and < 16.5.1
Fixed in: 15.7.7, 16.5.1
Safe to downgrade to: a release before 16.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
apple iphone os UPGRADE
Affected: < 15.7.7 · >= 16.0 and < 16.5.1
Fixed in: 15.7.7, 16.5.1
Safe to downgrade to: a release before 16.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
apple macos UPGRADE
Affected: >= 13.0 and < 13.4.1
Fixed in: 13.4.1
Safe to downgrade to: a release before 13.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
webkitgtk webkitgtk\+ UPGRADE
Affected: < 2.42.3
Fixed in: 2.42.3
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy webkitgtk+ || rpm -q webkitgtk+ || webkitgtk+ --version
2. UPGRADE to 2.42.3 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade webkitgtk+
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade webkitgtk+
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · borgmatic · FIXED · 2.2.0-1.fc46 · FEDORA-2026-041229e71b · source
sudo dnf upgrade --advisory=FEDORA-2026-041229e71b
Fedora ELN · pie · FIXED · 1.5.4-1.eln159 · FEDORA-2026-a2c0261d3a · source
sudo dnf upgrade --advisory=FEDORA-2026-a2c0261d3a
Ubuntu 22.04 · webkit2gtk · FIXED · 2.40.4-0ubuntu0.22.04.1
sudo apt update && sudo apt install --only-upgrade webkit2gtk dpkg --compare-versions "$(dpkg-query -W -f='${Version}' webkit2gtk)" ge "2.40.4-0ubuntu0.22.04.1" && echo PATCHED || echo STILL-VULNERABLE
Ubuntu 24.04 · webkit2gtk · FIXED · 2.40.3-1
sudo apt update && sudo apt install --only-upgrade webkit2gtk dpkg --compare-versions "$(dpkg-query -W -f='${Version}' webkit2gtk)" ge "2.40.3-1" && echo PATCHED || echo STILL-VULNERABLE
Debian 12 · webkit2gtk · FIXED · 2.40.3-2~deb12u1
sudo apt update && sudo apt install --only-upgrade webkit2gtk dpkg --compare-versions "$(dpkg-query -W -f='${Version}' webkit2gtk)" ge "2.40.3-2~deb12u1" && echo PATCHED || echo STILL-VULNERABLE
Debian 13 · webkit2gtk · FIXED · 2.40.3-1
sudo apt update && sudo apt install --only-upgrade webkit2gtk dpkg --compare-versions "$(dpkg-query -W -f='${Version}' webkit2gtk)" ge "2.40.3-1" && echo PATCHED || echo STILL-VULNERABLE
Debian 12 · wpewebkit · NO FIX YET
Debian 13 · wpewebkit · FIXED · 2.40.3-1
sudo apt update && sudo apt install --only-upgrade wpewebkit dpkg --compare-versions "$(dpkg-query -W -f='${Version}' wpewebkit)" ge "2.40.3-1" && echo PATCHED || echo STILL-VULNERABLE
RHEL 7 Extended Lifecycle Support · webkitgtk4 · FIXED · webkitgtk4-2.48.3-2.el7_9
sudo dnf upgrade --advisory=RHSA-2025:10364 rpm -q webkitgtk4
RHEL 8 · webkit2gtk3 · FIXED · webkit2gtk3-2.38.5-1.el8_8.5
sudo dnf upgrade --advisory=RHSA-2023:4202 rpm -q webkit2gtk3
RHEL 9 · webkit2gtk3 · FIXED · webkit2gtk3-2.38.5-1.el9_2.3
sudo dnf upgrade --advisory=RHSA-2023:4201 rpm -q webkit2gtk3
RHEL 6 · webkitgtk · DEFERRED
RHEL 7 · webkitgtk3 · DEFERRED
Amazon Linux 2 · see advisory · FIXED · ALAS2-2023-2141 · source
sudo yum update --advisory=ALAS2-2023-2141
Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-32439?

safari: upgrade to 16.5.1; ipados: upgrade to 15.7.7, 16.5.1; iphone os: upgrade to 15.7.7, 16.5.1. Exact commands for each OS are on this page.

Is CVE-2023-32439 being exploited?

Yes. CVE-2023-32439 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2023-32439 affect?

CVE-2023-32439 affects safari, ipados, iphone os. Severity is high (CVSS 8.8). A type confusion issue was addressed with improved checks. This issue is fixed in iOS 16.5.1 and iPadOS 16.5.1, iOS 15.7.7 and iPadOS 15.7.7, macOS Ventura 13.4.1, Safari 16.5.1. Processing maliciously crafted web content may lead to arbitr

How urgent is CVE-2023-32439?

Priority 80/100. High severity; EPSS top 2%: very likely to be exploited; Exploited in the wild (CISA KEV)

Software pages

iOS vulnerabilities · macOS vulnerabilities · Safari vulnerabilities · WebKit vulnerabilities · Apple Safari and WebKit vulnerabilities · iPadOS vulnerabilities

Related CVEs

References

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