# CVE-2026-56889: Google Pixel Bootloader permission bypass via integer overflow

Source: https://junglewise.ai/threats/cve-2026-56889-google-pixel-bootloader-permission-bypass-via-integer-overflow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-15. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-56889 · Severity: medium · CVSS 6.7 · Published 2026-09-15

The Pixel device bootloader contains an integer overflow vulnerability that can be exploited to bypass permission checks and gain system-level privileges. An attacker with local access to the device can exploit this flaw to escalate privileges without user interaction, potentially gaining complete control over the device.

Technologies: [Google Android](https://junglewise.ai/threats/technologies/android), [Google Pixel Bootloader](https://junglewise.ai/threats/technologies/pixel-bootloader). Vendors: [Google](https://junglewise.ai/threats/vendors/google).

## Quick answers

**Is CVE-2026-56889 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-56889 being exploited in the wild.

**How severe is CVE-2026-56889?** Medium severity, with a CVSS score of 6.7, published 15 September 2026.

**Which products and versions are affected?** Google Pixel Bootloader Prior to 2026-09-05 patch level.

**Is there a fix for CVE-2026-56889?** A patch was published on 2026-09-05. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-56889 attacked?** It is attacked with local access, in device firmware.

**Am I affected by CVE-2026-56889?** Check whether you run Google Android or Google Pixel Bootloader 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

This vulnerability is an integer overflow flaw occurring in multiple locations within the Pixel bootloader that leads to a permission bypass. The integer overflow allows an attacker to circumvent privilege checks, resulting in local escalation of privilege with System execution privileges. The attack vector is local, requiring physical or logical access to the device. No user interaction is required for exploitation. The vulnerability was patched in the September 2026 security update (patch level 2026-09-05 or later).

## Affected products

- Google Pixel Bootloader Prior to 2026-09-05 patch level

## Timeline

- 2026-09-15: disclosed
- 2026-09-05: patched

## References

- [https://source.android.com/docs/security/bulletin/pixel/2026/2026-09-01](https://source.android.com/docs/security/bulletin/pixel/2026/2026-09-01)

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