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CVE-2026-28918 is an out-of-bounds access vulnerability in Apple CoreSymbolication, affecting Apple platforms including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS prior to the fixed 26.5 releases. The flaw occurs while parsing a maliciously crafted file and was addressed through improved bounds checking. Available technical detail indicates the issue stems from insufficient validation of user-supplied data, allowing a read past the end of an allocated buffer within the CoreSymbolication framework.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A file parsing vulnerability in CoreSymbolication that may lead to unexpected app termination.
An out-of-bounds access vulnerability in macOS Tahoe that may cause unexpected app termination when parsing a maliciously crafted file.
An out-of-bounds access vulnerability in file parsing that could cause unexpected app termination.
An out-of-bounds access vulnerability in Apple TV file parsing that could cause unexpected app termination.
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.