# CVE-2026-56906: Linux kernel use-after-free in eventpoll

Source: https://junglewise.ai/threats/cve-2026-56906-in-ep-free-of-eventpoll-c-there-is-a-possible-use-after-free-due  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-06. Updated: 2026-10-06  
License: CC BY 4.0 with a link back

CVE-2026-56906 · Severity: high · CVSS 7 · Published 2026-10-06

A use-after-free race condition in the Linux kernel's eventpoll subsystem (ep_free in eventpoll.c) allows local attackers to escalate privileges without requiring special permissions. An attacker with local access can exploit the race condition to gain elevated system privileges and take full control of the device.

Technologies: [Google Pixel Devices](https://junglewise.ai/threats/technologies/pixel-devices), [Linux Kernel](https://junglewise.ai/threats/technologies/kernel). Vendors: [Google](https://junglewise.ai/threats/vendors/google), [Linux](https://junglewise.ai/threats/vendors/linux).

## Quick answers

**Is CVE-2026-56906 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-56906 being exploited in the wild.

**How severe is CVE-2026-56906?** High severity, with a CVSS score of 7, published 6 October 2026.

**Which products and versions are affected?** Google Pixel Devices Prior to 2026-10-05 security patch level; Linux Kernel <UNKNOWN>.

**Is there a fix for CVE-2026-56906?** A patch was published on 2026-10-05: Security patch level 2026-10-05 or later addresses the issue Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-56906 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-56906?** Check whether you run Google Pixel Devices or Linux Kernel 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 a use-after-free race condition in the ep_free function of eventpoll.c, allowing local privilege escalation. It affects the filesystem subsystem and requires only local access with no special privileges or user interaction needed. Successful exploitation grants privilege escalation to the attacker.

## Affected products

- Google Pixel devices Prior to 2026-10-05 security patch level
- Linux Linux kernel <UNKNOWN>

## Timeline

- 2026-10-06: disclosed: Published in Pixel Update Bulletin
- 2026-10-05: patched: Security patch level 2026-10-05 or later addresses the issue

## References

- [https://source.android.com/docs/security/bulletin/pixel/2026/2026-10-01](https://source.android.com/docs/security/bulletin/pixel/2026/2026-10-01)

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