CVE-2026-43773 Memory corruption in macOS
Mounting a malicious disk image can cause system termination or kernel memory corruption, requiring OS updates.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-43773?
CVE-2026-43773 is a critical memory corruption vulnerability in Apple Macos, published on 27 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory.
Weakness: CWE-125
Which versions are affected by CVE-2026-43773?
It affects 1 product.
Products include Apple Macos.
How do I fix CVE-2026-43773?
No fix has been published for CVE-2026-43773 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-43773 being exploited?
There is no known exploitation of CVE-2026-43773 in the wild and no public exploit code.
Other vulnerabilities in Apple Macos
Sources
Also known as GHSA-97g5-frq9-2c8c.