CVE-2025-43400
published 2025-09-29CVE-2025-43400: An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.1 and iPadOS 18.7.1, iOS 26.0.1 and iPadOS 26.0.1…
PriorityP343medium6.3CVSS 3.1
AVNACLPRNUIRSUCLILAL
EPSS
6.42%
93.0th percentile
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.1 and iPadOS 18.7.1, iOS 26.0.1 and iPadOS 26.0.1, macOS Sequoia 15.7.1, macOS Sonoma 14.8.1, macOS Tahoe 26.0.1, tvOS 26.1, visionOS 26.0.1, watchOS 26.1. Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory.
Affected
23 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apple | ios_18.7.1_and_ipados | — | — |
| apple | ios_26.0.1_and_ipados | — | — |
| apple | ios_and_ipados | < 18.7.1 | 18.7.1 |
| apple | ios_and_ipados | < 26.0.1 | 26.0.1 |
| apple | ipados | < 18.7.1 | 18.7.1 |
| apple | ipados | — | — |
| apple | iphone_os | < 18.7.1 | 18.7.1 |
| apple | iphone_os | — | — |
| apple | macos | < 14.8.1 | 14.8.1 |
| apple | macos | < 15.7.1 | 15.7.1 |
| apple | macos | < 26.0.1 | 26.0.1 |
| apple | macos | — | — |
| apple | macos | >= 14.0 < 14.8.1 | 14.8.1 |
| apple | macos | >= 15.0 < 15.7.1 | 15.7.1 |
| apple | macos_sequoia | — | — |
| apple | macos_sonoma | — | — |
| apple | macos_tahoe | — | — |
| apple | tvos | < 26.1 | 26.1 |
| apple | tvos | — | — |
| apple | visionos | < 26.0.1 | 26.0.1 |
| apple | visionos | — | — |
| apple | watchos | < 26.1 | 26.1 |
| apple | watchos | — | — |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Apple
CVE-2025-43400: tvOS 26.1
vendor_apple·2025-11-03·CVSS 6.3
CVE-2025-43400 [MEDIUM] CVE-2025-43400: tvOS 26.1
Apple Security Update: About the security content of tvOS 26.1
Product: tvOS
Version: 26.1
CVE: CVE-2025-43400
Component: FontParser
Impact: Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory
Description: An out-of-bounds write issue was addressed with improved bounds checking.
Apple
CVE-2025-43400: watchOS 26.1
vendor_apple·2025-11-03·CVSS 6.3
CVE-2025-43400 [MEDIUM] CVE-2025-43400: watchOS 26.1
Apple Security Update: About the security content of watchOS 26.1
Product: watchOS
Version: 26.1
CVE: CVE-2025-43400
Component: FontParser
Impact: Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory
Description: An out-of-bounds write issue was addressed with improved bounds checking.
Apple
CVE-2025-43400: macOS Sonoma 14.8.1
vendor_apple·2025-09-29·CVSS 6.3
CVE-2025-43400 [MEDIUM] CVE-2025-43400: macOS Sonoma 14.8.1
Apple Security Update: About the security content of macOS Sonoma 14.8.1
Product: macOS Sonoma
Version: 14.8.1
CVE: CVE-2025-43400
Component: FontParser
Impact: Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory
Description: An out-of-bounds write issue was addressed with improved bounds checking.
Apple
CVE-2025-43400: iOS 26.0.1 and iPadOS 26.0.1
vendor_apple·2025-09-29·CVSS 6.3
CVE-2025-43400 [MEDIUM] CVE-2025-43400: iOS 26.0.1 and iPadOS 26.0.1
Apple Security Update: About the security content of iOS 26.0.1 and iPadOS 26.0.1
Product: iOS 26.0.1 and iPadOS
Version: 26.0.1
CVE: CVE-2025-43400
Component: FontParser
Impact: Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory
Description: An out-of-bounds write issue was addressed with improved bounds checking.
Apple
CVE-2025-43400: macOS Sequoia 15.7.1
vendor_apple·2025-09-29·CVSS 6.3
CVE-2025-43400 [MEDIUM] CVE-2025-43400: macOS Sequoia 15.7.1
Apple Security Update: About the security content of macOS Sequoia 15.7.1
Product: macOS Sequoia
Version: 15.7.1
CVE: CVE-2025-43400
Component: FontParser
Impact: Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory
Description: An out-of-bounds write issue was addressed with improved bounds checking.
Apple
CVE-2025-43400: macOS Tahoe 26.0.1
vendor_apple·2025-09-29·CVSS 6.3
CVE-2025-43400 [MEDIUM] CVE-2025-43400: macOS Tahoe 26.0.1
Apple Security Update: About the security content of macOS Tahoe 26.0.1
Product: macOS Tahoe
Version: 26.0.1
CVE: CVE-2025-43400
Component: FontParser
Impact: Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory
Description: An out-of-bounds write issue was addressed with improved bounds checking.
Apple
CVE-2025-43400: visionOS 26.0.1
vendor_apple·2025-09-29·CVSS 6.3
CVE-2025-43400 [MEDIUM] CVE-2025-43400: visionOS 26.0.1
Apple Security Update: About the security content of visionOS 26.0.1
Product: visionOS
Version: 26.0.1
CVE: CVE-2025-43400
Component: FontParser
Impact: Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory
Description: An out-of-bounds write issue was addressed with improved bounds checking.
Apple
CVE-2025-43400: iOS 18.7.1 and iPadOS 18.7.1
vendor_apple·2025-09-29·CVSS 6.3
CVE-2025-43400 [MEDIUM] CVE-2025-43400: iOS 18.7.1 and iPadOS 18.7.1
Apple Security Update: About the security content of iOS 18.7.1 and iPadOS 18.7.1
Product: iOS 18.7.1 and iPadOS
Version: 18.7.1
CVE: CVE-2025-43400
Component: FontParser
Impact: Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory
Description: An out-of-bounds write issue was addressed with improved bounds checking.
GHSA
GHSA-pxpx-frfv-j88x: An out-of-bounds write issue was addressed with improved bounds checking
ghsa_unreviewed·2025-09-29
CVE-2025-43400 [MEDIUM] CWE-787 GHSA-pxpx-frfv-j88x: An out-of-bounds write issue was addressed with improved bounds checking
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sonoma 14.8.1, macOS Tahoe 26.0.1, macOS Sequoia 15.7.1, visionOS 26.0.1, iOS 26.0.1 and iPadOS 26.0.1, iOS 18.7.1 and iPadOS 18.7.1. Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://support.apple.com/en-us/125326https://support.apple.com/en-us/125327https://support.apple.com/en-us/125328https://support.apple.com/en-us/125329https://support.apple.com/en-us/125330https://support.apple.com/en-us/125338https://support.apple.com/en-us/125637https://support.apple.com/en-us/125639http://seclists.org/fulldisclosure/2025/Sep/73http://seclists.org/fulldisclosure/2025/Sep/76http://seclists.org/fulldisclosure/2025/Sep/78
2025-09-29
Published