---
id: CVE-2026-80777
title: 'kernel: futex/pi: Plug private futex exec() race (CVE-2026-80777)'
summary: >-
  A flaw was found in the Linux kernel. A race condition exists in the futex/pi
  component during the `exec()` system call. This vulnerability occurs because
  the memory management (mm) check is incorrect when a task's memory is being
  swapped …
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-416
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-04'
updated: '2026-10-24'
sourceUpdated: '2026-10-24T03:12:48+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80777.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80777.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80777'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2528549'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80777'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80777'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80777.mbox
  - url: 'https://kernelcve.org/list/?q=CVE-2026-80777'
  - url: 'https://git.kernel.org/stable/c/fdf538b2e69653ff740e84042245018e5680cd7b'
  - url: 'https://git.kernel.org/stable/c/0478bc6bf197629fea0331d65b39eeea043c6cf0'
  - url: 'https://git.kernel.org/stable/c/d7944cee62ec6cca1c90780a766960a57d3b4bb8'
  - url: 'https://git.kernel.org/stable/c/c5f0bc9fd1cec4a00400cc727fcde03e0fde17cc'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00209
epssPercentile: 0.10941
ingestedAt: '2026-10-19T10:20:54.954Z'
---

## Overview

A flaw was found in the Linux kernel. A race condition exists in the futex/pi component during the `exec()` system call. This vulnerability occurs because the memory management (mm) check is incorrect when a task's memory is being swapped out and freed, while still being referenced by private futexes. This can lead to the system attempting to access freed memory, potentially resulting in memory corruption or system instability.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80777.json)

**kernel: futex/pi: Plug private futex exec() race** — rated Moderate by Red Hat. Released 2026-09-04, updated 2026-10-24.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

Not affected:

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

## Remediation

Out of support scope

Workarounds / mitigations:

- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.