Arbitrary Code Execution in Apple WebKit/JavaScriptCore Web Content Processing
CVE-2022-48503 is an Apple WebKit/JavaScriptCore memory corruption vulnerability affecting multiple Apple platforms. Apple states the issue was addressed with improved bounds checks and that processing malicious web content may lead to arbitrary code execution. The flaw was fixed in tvOS 15.6, watchOS 8.7, iOS 15.6, iPadOS 15.6, macOS Monterey 12.5, and Safari 15.6. Supporting reporting further places the bug in the JavaScriptCore component and describes it as a WebContent read/write primitive used in the Coruna exploit kit against iOS 15.2 through 15.5 to obtain initial code execution in the browser renderer process.
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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
22 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A WebContent RCE exploit chain component in Coruna targeting iOS versions patched by iOS 15.6.
A WebKit vulnerability used in Coruna Stage 1 for older iOS versions to achieve initial code execution in the browser renderer process.
A WebContent read/write exploit used as part of the Coruna iOS exploit kit.
A WebKit out-of-bounds memory access vulnerability used in the Coruna exploit kit to aid memory access and bypass protections.
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.