Out-of-bounds write in Apple Model I/O/USD image parsing
CVE-2026-28940 is a memory corruption vulnerability in Apple’s Model I/O component, with reporting that ties the flaw to the USD library on macOS. Apple describes the issue as: processing a maliciously crafted image may corrupt process memory, and states it was addressed with improved memory handling. Additional reporting from ZDI characterizes the bug as an out-of-bounds write caused by improper validation of user-supplied data, resulting in a write past the end of an allocated buffer during parsing of attacker-controlled image/USD-related content. Affected Apple platforms include iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.7, macOS Tahoe 26.5, tvOS 26.5, and visionOS 26.5 prior to the fixes.
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Impact, mitigation & remediation
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Impact
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Mitigation
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Remediation
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Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
17 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A memory corruption vulnerability in Model I/O triggered by processing a maliciously crafted image.
A macOS Tahoe vulnerability where processing a maliciously crafted image may corrupt process memory.
An Apple TV image processing vulnerability that could corrupt process memory.
A memory corruption vulnerability in macOS Sequoia triggered by a maliciously crafted image.
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.