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Actively exploited · Published Nov 5, 2025 · Assigned by apple

CVE-2023-43000

High 8.8 Exploited

In plain English

A high-severity use-after-free in iOS and iPadOS from Apple. Attackers are actively exploiting it in the wild (listed by CISA on March 5, 2026). The chance it is exploited in the next 30 days is estimated at 4.0% (higher than 91% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)4.0%top 9.3% of all CVEs
Exploited in the wildYesCISA KEV since Mar 5, 2026
Attack toolingNoneno public tooling known

CISA guidance

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Federal agencies must remediate by Mar 26, 2026.

Official description

A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Ventura 13.5, iOS 16.6 and iPadOS 16.6, Safari 16.6, iOS 15.8.7 and iPadOS 15.8.7. Processing maliciously crafted web content may lead to memory corruption.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8webkit2gtk32.42.5-1.el8ALSA-2024:2982
AlmaLinux:8webkit2gtk32.50.3-1.el8_10ALSA-2025:22789
AlmaLinux:9webkit2gtk32.50.3-1.el9_7ALSA-2025:22790
AlmaLinux:8webkit2gtk3-devel2.42.5-1.el8ALSA-2024:2982
AlmaLinux:8webkit2gtk3-devel2.50.3-1.el8_10ALSA-2025:22789
AlmaLinux:9webkit2gtk3-devel2.50.3-1.el9_7ALSA-2025:22790
AlmaLinux:8webkit2gtk3-jsc2.50.3-1.el8_10ALSA-2025:22789
AlmaLinux:8webkit2gtk3-jsc2.42.5-1.el8ALSA-2024:2982
AlmaLinux:9webkit2gtk3-jsc2.50.3-1.el9_7ALSA-2025:22790
AlmaLinux:8webkit2gtk3-jsc-devel2.50.3-1.el8_10ALSA-2025:22789
AlmaLinux:8webkit2gtk3-jsc-devel2.42.5-1.el8ALSA-2024:2982
AlmaLinux:9webkit2gtk3-jsc-devel2.50.3-1.el9_7ALSA-2025:22790
Debian:12webkit2gtk2.42.1-1~deb12u1DEBIAN-CVE-2023-43000
Debian:12webkit2gtk2.42.1-1~deb12u1DSA-5527-1
Debian:13webkit2gtk2.42.0-1DEBIAN-CVE-2023-43000
Debian:14webkit2gtk2.42.0-1DEBIAN-CVE-2023-43000
Debian:12wpewebkitno fix listedDEBIAN-CVE-2023-43000
Debian:13wpewebkit2.42.0-1DEBIAN-CVE-2023-43000
Debian:14wpewebkit2.42.0-1DEBIAN-CVE-2023-43000
Rocky Linux:8webkit2gtk30:2.50.3-1.el8_10RLSA-2025:22789
Rocky Linux:9webkit2gtk30:2.50.3-1.el9_7RLSA-2025:22790
Ubuntu:22.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2023-43000
Ubuntu:24.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2023-43000
Ubuntu:22.04:LTSwebkit2gtk2.42.1-0ubuntu0.22.04.1UBUNTU-CVE-2023-43000
Ubuntu:22.04:LTSwpewebkitno fix listedUBUNTU-CVE-2023-43000

Affected products (as reported)

VendorProductVersions
Apple macOS unspecified – before 13.5
Apple iOS and iPadOS unspecified – before 16.6
Apple Safari unspecified – before 16.6
Apple iOS and iPadOS unspecified – before 15.8.7

Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References