A use-after-free issue was addressed with improved memory management.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Fix
- Fixed in 13.5, 16.6, 15.8.7
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Apple's macOS, iOS, iPadOS, and Safari are affected. Processing maliciously crafted web content may corrupt memory on the device.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Ventura 13.5, iOS 16.6 and iPadOS 16.6, Safari 16.6, iOS 15.8.7 and iPadOS 15.8.7. Processing maliciously crafted web content may lead to memory corruption.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
Affected versions
- Apple macOS
From unspecified · fixed in 13.5
- Apple iOS and iPadOS
From unspecified · fixed in 16.6
- Apple Safari
From unspecified · fixed in 16.6
- Apple iOS and iPadOS
From unspecified · fixed in 15.8.7
References 4
support.apple.com
Questions about CVE-2023-43000
What does this mean?
A use-after-free bug is a memory handling error in which a program keeps using memory after it has been released. Per the facts, processing maliciously crafted web content can cause memory corruption.Source: support.apple.com
Am I affected, and how do I check?
The advisory lists macOS, iOS and iPadOS, and Safari with fixes in macOS 13.5, iOS and iPadOS 16.6, Safari 16.6, and iOS and iPadOS 15.8.7. To check a device's version, look under the software update or About settings for the operating system, and for Safari, check its version in the Safari About window.Source: support.apple.com
What should I do about it?
Update to macOS 13.5, iOS or iPadOS 16.6 (or 15.8.7 on the older iOS and iPadOS line), or Safari 16.6, depending on the product in use.Source: support.apple.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2026-03-05, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data