CVE-2026-20635
Analyzed
Analyzed - Analysis Complete
Memory Handling Flaw in Apple OSes Causes Process Crash
Publication date: 2026-02-11
Last updated on: 2026-04-02
Assigner: Apple Inc.
Description
Description
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| apple | macos | to 26.3 (exc) |
| apple | tvos | to 26.3 (exc) |
| apple | visionos | to 26.3 (exc) |
| apple | watchos | to 26.3 (exc) |
| apple | ipados | to 18.7.5 (exc) |
| apple | ipados | From 26.0 (inc) to 26.3 (exc) |
| apple | iphone_os | to 18.7.5 (exc) |
| apple | iphone_os | From 26.0 (inc) to 26.3 (exc) |
| apple | safari | to 26.3 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-119 | The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability involves improper memory handling when processing maliciously crafted web content. It can cause an unexpected process crash on affected Apple operating systems and Safari.
How can this vulnerability impact me? :
The impact of this vulnerability is that processing specially crafted web content may cause an unexpected crash of the affected process, potentially disrupting normal device or application operation.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, update your Apple devices and software to the fixed versions where the issue is addressed.
- Update watchOS to version 26.3 or later.
- Update tvOS to version 26.3 or later.
- Update macOS Tahoe to version 26.3 or later.
- Update iOS and iPadOS to version 18.7.5 or 26.3 or later.
- Update visionOS to version 26.3 or later.
- Update Safari to version 26.3 or later.
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