# CVE-2026-20580: MediaTek USB use-after-free denial of service

Source: https://junglewise.ai/threats/cve-2026-20580-in-usb-there-is-a-possible-system-crash-due-to-use-after-free  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-02. Updated: 2026-11-02  
License: CC BY 4.0 with a link back

CVE-2026-20580 · Severity: info · Published 2026-11-02

A use-after-free vulnerability in the USB subsystem of MediaTek chipsets can crash the system, causing denial of service. An attacker who already has system-level privileges can trigger this crash without user interaction. Devices affected include smartphones, tablets, and IoT devices powered by MediaTek processors.

Technologies: [MediaTek Dimensity 5G](https://junglewise.ai/threats/technologies/dimensity-5g), [MediaTek Genio IoT](https://junglewise.ai/threats/technologies/genio-iot), [MediaTek Helio 4G](https://junglewise.ai/threats/technologies/helio-4g), [MediaTek Kompanio](https://junglewise.ai/threats/technologies/kompanio). Vendors: [MediaTek](https://junglewise.ai/threats/vendors/mediatek).

## Quick answers

**Is CVE-2026-20580 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-20580 being exploited in the wild.

**How severe is CVE-2026-20580?** 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-2026-20580?** 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-2026-20580 attacked?** It is attacked with local access, in device firmware.

**Am I affected by CVE-2026-20580?** 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 in USB handling allows code executing with system privilege to access freed memory, causing a kernel crash. The vulnerability requires existing system-level access (local attack vector) and results in denial of service through system crash. No privilege escalation is possible from this flaw alone.

## Affected products

- MediaTek Dimensity 5G
- MediaTek Helio 4G
- MediaTek Genio IoT
- MediaTek Kompanio

## Timeline

- 2026-11-02: disclosed

## References

- [https://www.mediatek.com/product-security-bulletin/November-2026](https://www.mediatek.com/product-security-bulletin/November-2026)

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- [MediaTek USB driver double free memory corruption](https://junglewise.ai/threats/cve-2026-20582-in-usb-there-is-a-possible-memory-corruption-due-to-double-free)