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Integer overflow in Apple Kernel leading to system termination

IdentifiersCVE-2026-28952CWE-190· Integer Overflow or Wraparound

CVE-2026-28952 is an Apple Kernel vulnerability caused by an integer overflow. Apple states the issue was addressed with improved input validation. The flaw affects iOS 18.7.9 and iPadOS 18.7.9 prior to the fix, as well as macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, and macOS Tahoe 26.5 prior to the fix. Successful triggering by a local app may cause unexpected system termination. No additional public detail about the specific vulnerable kernel function or code path is provided in the supplied content.

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ANALYST BRIEF

Impact, mitigation & remediation

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Impact

What an attacker gets, and what they’ve been doing with it.

A local application may be able to trigger a kernel-level denial of service resulting in unexpected system termination. Based on the provided content, the documented impact is limited to system instability or crash; there is no supplied evidence that this issue enables code execution, privilege escalation, or kernel memory disclosure.

Mitigation

If you can’t patch tonight, do this now.

Until patched, reduce exposure by limiting execution of untrusted or low-trust applications on affected devices, since the described attack vector requires an app to trigger the flaw locally. Standard hardening measures such as restricting app installation sources and minimizing local code execution opportunities may reduce risk, but the authoritative mitigation in the provided content is to install the security updates.

Remediation

Patch, then assume compromise.

Apply the vendor fixes released by Apple. The issue is fixed in iOS 18.7.9, iPadOS 18.7.9, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, and macOS Tahoe 26.5. Apple indicates the vulnerability was remediated through improved input validation in the Kernel.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

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.

VendorProductType
AppleIosoperating_system
AppleIpadosoperating_system
AppleIphone Osoperating_system
AppleMacosoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

What this page doesn’t show

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Exposure mapping

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Threat actor evidence

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Associated malware

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Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity37

Community discussion across Reddit, Mastodon, and other social sources.