---
title: "CVE-2026-80929: Linux Kernel - Broken Access Control"
description: "Linux kernel contains a broken access control vulnerability caused by improper placement of the \"cad_pid\" sysctl entry in pid_table[], allowing non-root users to modify it via unshared pid/user namespaces, exploit requires namespace unsharing."
url: https://panop.io/threat-heartbeat/CVE-2026-80929/
---

# CVE-2026-80929 Linux Kernel - Broken Access Control

Linux kernel contains a broken access control vulnerability caused by improper placement of the "cad\_pid" sysctl entry in pid\_table\[\], allowing non-root users to modify it via unshared pid/user namespaces, exploit requires namespace unsharing.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-80929)

## Details

Type

Broken Access Control

Impact

Privilege Escalation

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version with the patch moving "cad\_pid" to kern\_reboot\_table\[\].

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-80929](https://nvd.nist.gov/vuln/detail/CVE-2026-80929)
- [https://git.kernel.org/stable/c/7170ca01623b399c97f2ae9d3e228badc1f25ea3](https://git.kernel.org/stable/c/7170ca01623b399c97f2ae9d3e228badc1f25ea3)
- [https://git.kernel.org/stable/c/a09bc4eaa67e1a72df3b6d0beb3afeef1e1fdfcd](https://git.kernel.org/stable/c/a09bc4eaa67e1a72df3b6d0beb3afeef1e1fdfcd)
- [https://git.kernel.org/stable/c/e8527de7fea191fda704792a56081f9009aeec37](https://git.kernel.org/stable/c/e8527de7fea191fda704792a56081f9009aeec37)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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