WebKit memory corruption in Apple Safari and Apple platforms
CVE-2025-43431 is a WebKit memory-handling vulnerability affecting Safari and multiple Apple operating systems, as well as WebKitGTK and WPE WebKit. Apple states that processing maliciously crafted web content may lead to memory corruption, and that the issue was addressed with improved memory handling. Reported fixed versions include Safari 26.1; iOS 18.7.2 and iPadOS 18.7.2; iOS 26.1 and iPadOS 26.1; macOS Tahoe 26.1; tvOS 26.1; visionOS 26.1; watchOS 26.1. WebKitGTK and WPE WebKit are affected before 2.50.2. The flaw was credited to Google Big Sleep. The specific vulnerable function is not identified in the provided content.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Use-after-free in web content processing leading to unexpected process crash.
A memory corruption vulnerability in web content processing affecting macOS Sonoma and macOS Sequoia.
A high-severity memory corruption vulnerability in Apple Safari and related Apple operating systems that can be triggered by processing maliciously crafted web content, potentially leading to remote code execution or compromise.
A WebKit memory-handling vulnerability in Safari 26.1 that could lead to memory corruption.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.