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CVE-2025-43398 is a kernel vulnerability in Apple operating systems caused by improper memory handling. Apple indicates the issue was corrected through improved memory handling in the kernel. Successful exploitation allows a local application to trigger unexpected system termination, indicating a memory-safety flaw in kernel-space processing reachable by an app. The vulnerability affects multiple Apple platforms, including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS, and was fixed in iOS 18.7.2, iPadOS 18.7.2, iOS 26.1, iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, and watchOS 26.1.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Memory handling issue leading to unexpected system termination (DoS).
A macOS Sequoia memory handling issue that may allow an app to cause unexpected system termination.
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.