Use-after-free in Apple mDNSResponder
CVE-2026-43668 is a use-after-free vulnerability in Apple's mDNSResponder component. Apple states the issue was addressed with improved memory management. The flaw affects multiple Apple operating systems, including iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5, and Apple Vision Pro. Based on the advisory context, the vulnerable component is network-reachable and can be triggered remotely against mDNSResponder, resulting in memory corruption in a kernel-relevant context.
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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
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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
24 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remote vulnerability in mDNSResponder that may allow unexpected system termination or kernel memory corruption.
A use-after-free vulnerability in macOS Tahoe that may allow a remote attacker to cause unexpected system termination or corrupt kernel memory.
A remote use-after-free vulnerability that could cause system termination or kernel memory corruption.
A use-after-free vulnerability in Apple TV software that could allow a remote attacker to cause system termination or corrupt kernel memory.
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.