Quick answers
- Is CVE-2026-84520 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-84520 being exploited in the wild.
- How severe is CVE-2026-84520?
- Critical severity, with a CVSS score of 9.8, published 14 September 2026.
- Which products and versions are affected?
- Apple macOS Golden Gate prior to 27.
- Is there a fix for CVE-2026-84520?
- A patch was published on 2026-09-14: Fixed in macOS Golden Gate 27 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-84520 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-84520?
- Check whether you run Apple macOS or Apple macOS Golden Gate at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A buffer overflow vulnerability exists in kernel memory handling due to insufficient size validation. The vulnerability allows a local attacker to write beyond allocated buffer boundaries, potentially corrupting kernel memory. Attack requires local access to the affected macOS system. Successful exploitation can result in unexpected system termination (kernel panic) or arbitrary kernel memory corruption, which could enable privilege escalation or further system compromise. The vulnerability is addressed in macOS Golden Gate 27 through improved size validation and bounds checking.
Affected products
- Apple macOS Golden Gate prior to 27
Timeline
- 2026-09-14: disclosed
- 2026-09-14: patched: Fixed in macOS Golden Gate 27