Quick answers
- Is CVE-2026-20559 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20559 being exploited in the wild.
- How severe is CVE-2026-20559?
- Informational severity, published 2 November 2026.
- Which products and versions are affected?
- MediaTek Dimensity 5G; MediaTek Helio 4G; MediaTek Genio IoT; MediaTek Kompanio.
- Is there a fix for CVE-2026-20559?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-20559 attacked?
- It is attacked with local access, in device firmware.
- Am I affected by CVE-2026-20559?
- Check whether you run MediaTek Dimensity 5G, MediaTek Genio IoT, MediaTek Helio 4G or one of the others listed. 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 use-after-free flaw exists in GPU PDMA that allows memory corruption when freed memory is accessed. The vulnerability requires local execution context with user privileges but no user interaction. Successful exploitation leads to privilege escalation to system level, enabling arbitrary code execution with elevated permissions.
Affected products
- MediaTek Dimensity 5G
- MediaTek Helio 4G
- MediaTek Genio IoT
- MediaTek Kompanio
Timeline
- 2026-11-02: disclosed