Apple Multiple Products Classic Buffer Overflow Vulnerability
A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may be able to cause unexpected system termination or write kernel memory.
What happened
A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may be able to cause unexpected system termination or write kernel memory.
CISA lists it as exploited, added 20 Mar 2026.
Does it affect you
Names Apple macOS. Enter the product and version you run to place it against the affected range the vendor published.
What to do
- Follow the vendor advisory for the fixed release and any interim mitigation.
support.apple.com - Follow the vendor advisory for the fixed release and any interim mitigation.
support.apple.com - Follow the vendor advisory for the fixed release and any interim mitigation.
support.apple.com - Follow the vendor advisory for the fixed release and any interim mitigation.
support.apple.com - Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
cisa.gov
CISA’s notes for this entry:
Affected, as published to NVD
- macos
- Apple macOS: exactly 26.0
The record
- NVD status
- Analyzed
- Published
- 12 Dec 2025, last modified 07 Oct 2026 (NVD)
- Severity
- CVSS 3.1 base score 5.5, Medium — computed here from the vector; NVD states 5.5.
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness
- CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') (NVD; names by MITRE)
- Exploitation
- Listed in CISA’s Known Exploited Vulnerabilities catalogue since 20 Mar 2026; federal remediation due 03 Apr 2026. CISA entry
- Exploit probability
- EPSS 0.4%, 36th percentile — FIRST, scored 23 Oct 2026. FIRST EPSS
- Vendor
- Apple · Multiple Products (CISA)
References on the NVD record
- support.apple.com/en-us/125632Release NotesVendor Advisory
- support.apple.com/en-us/125633Release NotesVendor Advisory
- support.apple.com/en-us/125634Release NotesVendor Advisory
- support.apple.com/en-us/125635Release NotesVendor Advisory
- support.apple.com/en-us/125636Release NotesVendor Advisory
- support.apple.com/en-us/125637Release NotesVendor Advisory
- support.apple.com/en-us/125638Release NotesVendor Advisory
- support.apple.com/en-us/125639Release NotesVendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43520US Government Resource
- cloud.google.com/blog/topics/threat-intelligence/darksword-ios-exploit-chain/Technical Description
Sources
The verdict above is computed from the products and versions you entered and the affected ranges the vendor published to NVD. It does not inspect your environment, and this site never reports a product as unaffected: why.