Process crash in WebKit from maliciously crafted web content
CVE-2025-43440 is a WebKit vulnerability affecting Apple Safari and multiple Apple operating systems, as well as WebKitGTK and WPE WebKit before 2.50.2. According to the provided advisories, processing maliciously crafted web content may lead to an unexpected process crash. Apple states the issue was addressed with improved checks. The available content does not identify the specific vulnerable function or subsystem beyond WebKit, and does not provide sufficient technical detail to assign a precise root-cause class with confidence.
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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
7 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 Safari crash.
A web content processing vulnerability that may cause an unexpected process crash on macOS Sonoma and macOS Sequoia.
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.