# CVE-2026-68590: MediaTek ip_stack out of bounds read in 5G modem

Source: https://junglewise.ai/threats/cve-2026-68590-in-ip-stack-there-is-a-possible-out-of-bounds-read-due-to  
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-2026-68590 · Severity: info · Published 2026-11-02

MediaTek's ip_stack component, used in 5G modems and connectivity chipsets, contains an out of bounds read vulnerability due to improper input validation. An attacker controlling a rogue base station could trigger a denial of service on connected devices without requiring special privileges or user interaction.

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

## Quick answers

**Is CVE-2026-68590 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-68590 being exploited in the wild.

**How severe is CVE-2026-68590?** Informational severity, published 2 November 2026.

**Which products and versions are affected?** MediaTek 5G Modem; MediaTek Dimensity 5G; MediaTek Helio 4G.

**Is there a fix for CVE-2026-68590?** 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-2026-68590 attacked?** It is attacked from the adjacent network, in device firmware.

**Am I affected by CVE-2026-68590?** Check whether you run MediaTek 5G Modem, MediaTek Dimensity 5G or MediaTek Helio 4G. 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

An out of bounds read in the ip_stack component results from improper input validation, allowing remote denial of service when a UE connects to an attacker-controlled rogue base station. The vulnerability requires no additional execution privileges and does not need user interaction. The attack vector is adjacent network access via the cellular connection.

## Affected products

- MediaTek 5G Modem
- MediaTek Dimensity 5G
- MediaTek Helio 4G

## Timeline

- 2026-11-02: advisory

## References

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

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