Use after free in Apple iOS and iPadOS
Priority MEDIUM 43CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
A use-after-free issue was addressed with improved memory management. This issue is fixed in iOS 17 and iPadOS 17, watchOS 10, macOS Sonoma 14. Processing web content may lead to arbitrary code execution.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0165 76th percentileScored 2026-11-08
Fix Partial iOS and iPadOS (Apple): 17macOS (Apple): 14+1 more productRed Hat: 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apple | iOS and iPadOS | before 17 | 17 | Patch available | CNA |
| Apple | macOS | before 14 | 14 | Patch available | CNA |
| Apple | watchOS | before 10 | 10 | Patch available | CNA |
- iOS and iPadOS VendorApple Affected before 17 Fixed in 17 Patch available CNA
- macOS VendorApple Affected before 14 Fixed in 14 Patch available CNA
- watchOS VendorApple Affected before 10 Fixed in 10 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* | before 17.0 | Vulnerable | Apple |
| cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* | before 17.0 | Vulnerable | Apple |
| cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* | before 14.0 | Vulnerable | Apple |
| cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* | before 10.0 | Vulnerable | Apple |
- cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 17.0 Vulnerable ·Apple
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 17.0 Vulnerable ·Apple
- cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 14.0 Vulnerable ·Apple
- cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 10.0 Vulnerable ·Apple
Remediation
- Fix · CNA iOS and iPadOS (Apple) Fixed in 17
- Fix · CNA macOS (Apple) Fixed in 14
- Fix · CNA watchOS (Apple) Fixed in 10
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Apple macOS 14
60 records Highest priority Priority MEDIUM 9 MEDIUM, 51 LOW
Other records, highest priority first
- TI-2023-21273 Apple macOS: A sandboxed process may be able to circumvent sandbox restrictionsPriority MEDIUM 52
- TI-2023-21219 Apple iOS and iPadOS: A remote user may cause an unexpected app termination or arbitrary…Priority MEDIUM 52
- TI-2023-19959 Apple macOS: A sandboxed process may be able to circumvent sandbox restrictionsPriority MEDIUM 52
- Release ·
Apple iOS and iPadOS 17
48 records Highest priority Priority MEDIUM 5 MEDIUM, 43 LOW
Other records, highest priority first
- TI-2023-21219 Apple iOS and iPadOS: A remote user may cause an unexpected app termination or arbitrary…Priority MEDIUM 52
- TI-2023-21698 Code injection in Apple iOS and iPadOSPriority MEDIUM 47
- TI-2023-21266 Apple iOS and iPadOS: A remote attacker may be able to break out of Web Content sandboxPriority MEDIUM 47
Show 1 more group
- Release ·
Apple watchOS 10
37 records Highest priority Priority MEDIUM 5 MEDIUM, 32 LOW
Other records, highest priority first
- TI-2023-21219 Apple iOS and iPadOS: A remote user may cause an unexpected app termination or arbitrary…Priority MEDIUM 52
- TI-2023-21698 Code injection in Apple iOS and iPadOSPriority MEDIUM 47
- TI-2023-21266 Apple iOS and iPadOS: A remote attacker may be able to break out of Web Content sandboxPriority MEDIUM 47
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
Not affected: 2 products
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-39434
- 2026-10-03 Alias added: GHSA-84c6-x9x8-7q38
References
Advisory 7
- https://support.apple.com/en-us/HT213938
- https://support.apple.com/en-us/HT213940
- https://support.apple.com/en-us/HT213937
- http://www.openwall.com/lists/oss-security/2023/09/28/3
- http://seclists.org/fulldisclosure/2023/Oct/8
- http://seclists.org/fulldisclosure/2023/Oct/9
- http://seclists.org/fulldisclosure/2023/Oct/3
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-2023-39434 · CVE Program
- CVE-2023-39434 · NVD
- FIRST EPSS
- GHSA-84c6-x9x8-7q38 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-39434 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences