iOS/iPadOS OOB Write in Image Parser before 15.8.5/16.7.12
CVE-2025-43300 Published on August 21, 2025
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS 15.8.5, iOS 16.7.12 and iPadOS 16.7.12. Processing a malicious image file may result in memory corruption. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals.
Known Exploited Vulnerability
This Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Apple iOS, iPadOS, and macOS contain an out-of-bounds write vulnerability in the Image I/O framework.
The following remediation steps are recommended / required by September 11, 2025: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Vulnerability Analysis
CVE-2025-43300 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2025-43300 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2025-43300
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Affected Versions
Apple iOS and iPadOS:- Version unspecified and below 15.8 is affected.
- Version unspecified and below 16.7 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.