Kernel denial-of-service in Apple operating systems
CVE-2026-20654 is a kernel memory-handling vulnerability in Apple platforms. Apple states that, prior to the fix, an app may be able to trigger unexpected system termination due to improper memory handling in the kernel. The issue was addressed with improved memory handling and is fixed in watchOS 26.3, tvOS 26.3, macOS Tahoe 26.3, visionOS 26.3, iOS 26.3, and iPadOS 26.3. Based on the available advisory text, the vulnerability is exploitable by a local app and results in a kernel-level crash or panic condition rather than code execution or privilege escalation. Apple has not publicly provided more specific technical detail about the affected kernel subsystem or vulnerable function.
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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.
Kernel issue allowing an app to trigger unexpected system termination.
Local privilege escalation to root by a malicious app; fixed with improved checks.
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.