Kernel UDP socket interface binding logic flaw in Apple operating systems
CVE-2025-43359 is a kernel logic issue in Apple operating systems in which a UDP server socket that is intended to be bound only to a local interface may instead become bound to all interfaces. Apple states the issue was addressed through improved state management. Based on the advisory text, the flaw affects socket/interface binding state handling in the kernel networking stack, causing the effective exposure of a UDP listener to expand beyond the interface originally specified by the application.
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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
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A logic/state-management issue where a UDP socket intended to bind locally may become exposed on all interfaces (potential unintended network exposure).
A Kernel networking vulnerability where a UDP server socket intended for a local interface may become bound to all interfaces.
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.