Detections
Analytics

CVE-2025-43400

medium

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in watchOS 26.1, tvOS 26.1. Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory.

References

https://securityaffairs.com/182835/security/apple-urges-users-to-update-iphone-and-mac-to-patch-font-bug.html

https://www.securityweek.com/apple-updates-ios-and-macos-to-prevent-malicious-font-attacks/

https://isc.sans.edu/diary/rss/32330

https://support.apple.com/en-us/125639

https://support.apple.com/en-us/125637

http://seclists.org/fulldisclosure/2025/Sep/78

http://seclists.org/fulldisclosure/2025/Sep/76

http://seclists.org/fulldisclosure/2025/Sep/73

Details

Source: Mitre, NVD

Published: 2025-09-29

Updated: 2025-11-04

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 6.3

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Severity: Medium

EPSS

EPSS: 0.0004