---
id: CVE-2026-80929
title: >-
  kernel: sysctl: move the "cad_pid" entry from pid_table[] to
  kern_reboot_table[] (CVE-2026-80929)
summary: >-
  A flaw was found in the Linux kernel. A non-root user can exploit a
  vulnerability in the `sysctl` mechanism, specifically related to the `cad_pid`
  entry. By unsharing process ID (PID) and user namespaces, a local attacker can
  modify this g…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: vendor
cwe: CWE-279
vendor: Red Hat
product: Red Hat Enterprise Linux 6
affected:
  - enterprise_linux 6
published: '2026-09-11'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T13:54:03+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80929.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80929.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80929'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532283'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80929'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80929'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80929.mbox
  - url: 'https://git.kernel.org/stable/c/e8527de7fea191fda704792a56081f9009aeec37'
  - url: 'https://git.kernel.org/stable/c/a09bc4eaa67e1a72df3b6d0beb3afeef1e1fdfcd'
  - url: 'https://git.kernel.org/stable/c/7170ca01623b399c97f2ae9d3e228badc1f25ea3'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00161
epssPercentile: 0.05757
scores:
  vendor: 7
  cna: 7.8
ingestedAt: '2026-09-14T15:23:07.476Z'
---

## Overview

A flaw was found in the Linux kernel. A non-root user can exploit a vulnerability in the `sysctl` mechanism, specifically related to the `cad_pid` entry. By unsharing process ID (PID) and user namespaces, a local attacker can modify this global system control from a child namespace. This allows a user without administrative privileges to alter a critical system setting that should only be modifiable by the root user, leading to privilege escalation.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80929.json)

**kernel: sysctl: move the "cad_pid" entry from pid_table[] to kern_reboot_table[]** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.

Affected:

- Red Hat Enterprise Linux 6

No fix planned:

- Red Hat Enterprise Linux 6

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Out of support scope