Out-of-bounds write in Apple iOS
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1. An application may be able to execute arbitrary code with kernel privileges.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apple | iOS | before iOS 13.3.1 and iPadOS 13.3.1 | iOS 13.3.1 and iPadOS 13.3.1 | Patch available | CNA |
- iOS VendorApple Affected before iOS 13.3.1 and iPadOS 13.3.1 Fixed in iOS 13.3.1 and iPadOS 13.3.1 Patch available CNA
Remediation
- Fix · CNA iOS (Apple) Fixed in iOS 13.3.1 and iPadOS 13.3.1
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Apple iOS iOS 13.3.1 and iPadOS 13.3.1
25 records Highest priority Priority CRITICAL 1 CRITICAL, 2 MEDIUM, 22 LOW
Other records, highest priority first
- TI-2020-03339 Out-of-bounds write in Apple iOSPriority CRITICAL 93
- TI-2020-03348 Memory corruption in Apple iOSPriority MEDIUM 42
- TI-2020-03328 Out-of-bounds write in Apple iOSPriority MEDIUM 41
Timeline
- 2026-10-02 Threatist record created from CVE-2020-3858
- 2026-10-03 Alias added: GHSA-jx55-gvx7-5qqp
References
Advisory 1
More Apple Ipados vulnerabilities
- TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
- TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
- TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
- TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
- TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
- TI-2022-06854 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2020-3858 · CVE Program
- CVE-2020-3858 · NVD
- FIRST EPSS
- GHSA-jx55-gvx7-5qqp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences