CVE-2023-32435: Apple Multiple Products WebKit Memory Corruption Vulnerability

Q: How do I fix CVE-2023-32435?

safari: upgrade to 16.4; ipados: upgrade to 15.7.7, 16.4; iphone os: upgrade to 15.7.7, 16.4. Exact commands for each OS are on this page.

Q: Is CVE-2023-32435 being exploited?

Yes. CVE-2023-32435 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

Q: What does CVE-2023-32435 affect?

CVE-2023-32435 affects safari, ipados, iphone os. Severity is high (CVSS 8.8). 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 execut

Q: How urgent is CVE-2023-32435?

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

Patch now

HIGH 8.8EXPLOITEDUPGRADEUPGRADEUPGRADE

CVE-2023-32435 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 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.

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 score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	23.0% (top 2%)
CISA exploited list	Yes, fix due 2023-07-14
Weakness	CWE-787
Published	2023-06-23
Last modified	2026-06-17

Publisher (CNA): Apple Inc. · Vendor: apple

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

Am I affected?

Timeline

2023-06-23Exploited Added to the CISA Known Exploited Vulnerabilities list
2023-06-23 18:15 UTCPublished CVE record published
2023-07-14Deadline CISA due date for US federal agencies to patch
2026-06-17 05:58 UTCUpdated Record last modified

apple safari UPGRADE

Affected: < 16.4

Fixed in: 16.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy safari || rpm -q safari || safari --version

2. UPGRADE to 16.4 (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 < 16.4

Fixed in: 15.7.7, 16.4

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 < 16.4

Fixed in: 15.7.7, 16.4

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 < 13.3

Fixed in: 13.3

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.

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 · NOT AFFECTED

Debian 12 · webkit2gtk · FIXED · 2.40.0-1

sudo apt update && sudo apt install --only-upgrade webkit2gtk dpkg --compare-versions "$(dpkg-query -W -f='${Version}' webkit2gtk)" ge "2.40.0-1" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · webkit2gtk · FIXED · 2.40.0-1

sudo apt update && sudo apt install --only-upgrade webkit2gtk dpkg --compare-versions "$(dpkg-query -W -f='${Version}' webkit2gtk)" ge "2.40.0-1" && echo PATCHED || echo STILL-VULNERABLE

Debian 12 · wpewebkit · NO FIX YET

Debian 13 · wpewebkit · FIXED · 2.40.2-2

sudo apt update && sudo apt install --only-upgrade wpewebkit dpkg --compare-versions "$(dpkg-query -W -f='${Version}' wpewebkit)" ge "2.40.2-2" && 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-2023-32435?

safari: upgrade to 16.4; ipados: upgrade to 15.7.7, 16.4; iphone os: upgrade to 15.7.7, 16.4. Exact commands for each OS are on this page.

Is CVE-2023-32435 being exploited?

Yes. CVE-2023-32435 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2023-32435 affect?

CVE-2023-32435 affects safari, ipados, iphone os. Severity is high (CVSS 8.8). 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 execut

How urgent is CVE-2023-32435?

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

CVE-2023-43000 HIGH 8.8 EXPLOITED UPGRADE UPGRADE Apple Multiple products Use-After-Free Vulnerability
CVE-2026-43715 HIGH 8.8 UPGRADE UPGRADE A use-after-free issue was addressed with improved memory management
CVE-2025-43342 CRITICAL 9.8 UPGRADE UPGRADE A correctness issue was addressed with improved checks
CVE-2025-43343 CRITICAL 9.8 UPGRADE UPGRADE The issue was addressed with improved memory handling
CVE-2025-43376 HIGH 7.5 UPGRADE UPGRADE A logic issue was addressed with improved state management

References

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