Vulnerability · Published Nov 4, 2025 · Assigned by apple
CVE-2025-43421
Medium 4.3
In plain English
A medium-severity out-of-bounds read in iOS and iPadOS from Apple. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.6%top 48.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Multiple issues were addressed by disabling array allocation sinking. This issue is fixed in Safari 26.1, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1. Processing maliciously crafted web content may lead to an unexpected process crash.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | webkit2gtk3 | 2.50.3-1.el8_10 | ALSA-2025:22789 |
| AlmaLinux:9 | webkit2gtk3 | 2.50.3-1.el9_7 | ALSA-2025:22790 |
| AlmaLinux:8 | webkit2gtk3-devel | 2.50.3-1.el8_10 | ALSA-2025:22789 |
| AlmaLinux:9 | webkit2gtk3-devel | 2.50.3-1.el9_7 | ALSA-2025:22790 |
| AlmaLinux:8 | webkit2gtk3-jsc | 2.50.3-1.el8_10 | ALSA-2025:22789 |
| AlmaLinux:9 | webkit2gtk3-jsc | 2.50.3-1.el9_7 | ALSA-2025:22790 |
| AlmaLinux:8 | webkit2gtk3-jsc-devel | 2.50.3-1.el8_10 | ALSA-2025:22789 |
| AlmaLinux:9 | webkit2gtk3-jsc-devel | 2.50.3-1.el9_7 | ALSA-2025:22790 |
| Debian:12 | webkit2gtk | 2.50.3-1~deb12u1 | DEBIAN-CVE-2025-43421 |
| Debian:12 | webkit2gtk | 2.50.3-1~deb12u1 | DSA-6074-1 |
| Debian:13 | webkit2gtk | 2.50.3-1~deb13u1 | DSA-6074-1 |
| Debian:13 | webkit2gtk | 2.50.3-1~deb13u1 | DEBIAN-CVE-2025-43421 |
| Debian:14 | webkit2gtk | 2.50.3-1 | DEBIAN-CVE-2025-43421 |
| Debian:12 | wpewebkit | no fix listed | DEBIAN-CVE-2025-43421 |
| Debian:13 | wpewebkit | no fix listed | DEBIAN-CVE-2025-43421 |
| Debian:14 | wpewebkit | 2.50.3-1 | DEBIAN-CVE-2025-43421 |
| Rocky Linux:8 | webkit2gtk3 | 0:2.50.3-1.el8_10 | RLSA-2025:22789 |
| Rocky Linux:9 | webkit2gtk3 | 0:2.50.3-1.el9_7 | RLSA-2025:22790 |
| Ubuntu:22.04:LTS | qtwebkit-opensource-src | no fix listed | UBUNTU-CVE-2025-43421 |
| Ubuntu:24.04:LTS | qtwebkit-opensource-src | no fix listed | UBUNTU-CVE-2025-43421 |
| Ubuntu:22.04:LTS | webkit2gtk | 2.50.3-0ubuntu0.22.04.1 | USN-7941-1 |
| Ubuntu:22.04:LTS | webkit2gtk | 2.50.3-0ubuntu0.22.04.1 | UBUNTU-CVE-2025-43421 |
| Ubuntu:24.04:LTS | webkit2gtk | 2.50.3-0ubuntu0.24.04.1 | UBUNTU-CVE-2025-43421 |
| Ubuntu:24.04:LTS | webkit2gtk | 2.50.3-0ubuntu0.24.04.1 | USN-7941-1 |
| Ubuntu:25.10 | webkit2gtk | 2.50.3-0ubuntu0.25.10.1 | USN-7941-1 |
| Ubuntu:25.10 | webkit2gtk | 2.50.3-0ubuntu0.25.10.1 | UBUNTU-CVE-2025-43421 |
| Ubuntu:22.04:LTS | wpewebkit | no fix listed | UBUNTU-CVE-2025-43421 |
Affected products (as reported)
Weakness: CWE-125, CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L