CVE-2026-43812
A critical use‑after‑free bug in Apple’s operating systems can let a malicious app crash the entire system. The flaw was fixed in recent OS releases. Users should update to avoid unexpected shutdowns.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Apple devices running iOS 26.5 or earlier, iPadOS 26.5 or earlier, macOS Sequoia 15.7.7 or earlier, macOS Tahoe 26.5 or earlier, tvOS 26.5 or earlier, or visionOS 26.5 or earlier.
Real-world impact
An attacker could trigger a crash that stops the device from functioning, causing a denial of service and potential loss of unsaved data.
Why this severity
The CVSS score of 9.8 reflects that the vulnerability gives an attacker full control to cause a system crash with no authentication or user interaction, destroying confidentiality, integrity, and availability.
What to do about it
- 011. Update your device to the latest OS version (iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6, tvOS 26.6, or visionOS 26.6).
- 022. Restart the device to complete the update.
NVD-referenced vendor advisory
Timeline
- Jul 27, 2026 · 3d agoPublishedDisclosed and added to the National Vulnerability Database.
- Jul 28, 2026 · 2d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.
How it’s attacked
References & advisories
- support.apple.com/en-us/128066release notesvendor advisory
- support.apple.com/en-us/128067release notesvendor advisory
- support.apple.com/en-us/128069release notesvendor advisory
- support.apple.com/en-us/128070release notesvendor advisory
- support.apple.com/en-us/128071release notesvendor advisory