Quick answers
- Is CVE-2026-20489 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-20489 being exploited in the wild.
- How severe is CVE-2026-20489?
- Medium severity, with a CVSS score of 4.4, published 3 August 2026.
- Which products and versions are affected?
- MediaTek Chipset Display Driver <UNKNOWN>.
- Is there a fix for CVE-2026-20489?
- A patch was published on 2026-08-03: Patch ID ALPS11004274 issued; Device OEMs notified at least 2 months prior Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-20489 attacked?
- It is attacked with local access, in device firmware.
- Am I affected by CVE-2026-20489?
- Check whether you run MediaTek Chipset Display Driver, MediaTek Mt6991, MediaTek Mt6991 Firmware or one of the others listed 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
The vulnerability is an integer overflow flaw in the display subsystem of MediaTek chipsets that leads to information disclosure. The root cause lies in improper bounds checking during integer arithmetic operations in the display driver, allowing an attacker to read out-of-bounds memory. Exploitation requires the attacker to already possess system-level privileges (no user interaction needed), and can be achieved through local attack vectors only. A successful exploit allows reading of sensitive kernel or system memory that would normally be protected, potentially exposing cryptographic keys, credentials, or other confidential data. Patches are available via ALPS11004274.
Affected products
- MediaTek Chipset Display Driver <UNKNOWN>
Timeline
- 2026-08-03: disclosed
- 2026-08-03: patched: Patch ID ALPS11004274 issued; Device OEMs notified at least 2 months prior