CVE-2026-20536: MediaTek aidl memory corruption use after free

CVE-2026-20536 · Severity: medium · CVSS 6.7 · Published 2026-10-05

MediaTek's aidl component contains a use-after-free memory corruption vulnerability that allows privilege escalation on affected chipsets. An attacker who already has System-level privileges can exploit this without user interaction to further compromise the device. This affects multiple MediaTek processors used in smartphones and other devices.

Technologies: MediaTek Dimensity 5G, MediaTek Helio 4G. Vendors: MediaTek.

Quick answers

Is CVE-2026-20536 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-20536 being exploited in the wild.
How severe is CVE-2026-20536?
Medium severity, with a CVSS score of 6.7, published 5 October 2026.
Which products and versions are affected?
MediaTek Dimensity 5G Multiple variants; MediaTek Helio 4G Multiple variants; MediaTek MT2716, MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6881, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896 All versions with aidl component.
Is there a fix for CVE-2026-20536?
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-2026-20536 attacked?
It is attacked with local access, in device firmware.
Am I affected by CVE-2026-20536?
Check whether you run MediaTek Dimensity 5G, MediaTek Helio 4G, MediaTek MT2716, MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6881, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895 or MT6896 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 use-after-free vulnerability in MediaTek aidl allows memory corruption that can be exploited for local privilege escalation. The vulnerability requires the attacker to already possess System privilege; no user interaction is needed. Successful exploitation can lead to further privilege elevation and system compromise.

Affected products

  • MediaTek Dimensity 5G Multiple variants
  • MediaTek Helio 4G Multiple variants
  • MediaTek MT2716, MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6881, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896 All versions with aidl component

Timeline

  • 2026-10-05: disclosed

References

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