CVE-2026-43719 Use after free in macOS
A use-after-free vulnerability in macOS allows attackers to cause system termination by mounting a maliciously crafted SMB network share.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-43719?
CVE-2026-43719 is a medium-severity use after free vulnerability in Apple Macos, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Mounting a maliciously crafted SMB network share may lead to system termination.
Weakness: CWE-416
Which versions are affected by CVE-2026-43719?
It affects 1 product.
Products include Apple Macos.
How do I fix CVE-2026-43719?
No fix has been published for CVE-2026-43719 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-43719 being exploited?
There is no known exploitation of CVE-2026-43719 in the wild and no public exploit code.
Other vulnerabilities in Apple Macos
Sources
Also known as GHSA-7c3r-2ff2-pqq2.