---
title: "CVE-2026-89986: Linux Kernel - Denial of Service"
description: "Linux kernel contains a sleeping allocation vulnerability in alloc_pages_bulk_weighted_interleave() caused by improper GFP flag usage in atomic context, letting kernel tasks trigger invalid context errors, exploit requires specific mempolicy and atomic context."
url: https://panop.io/threat-heartbeat/CVE-2026-89986/
---

# CVE-2026-89986 Linux Kernel - Denial of Service

Linux kernel contains a sleeping allocation vulnerability in alloc\_pages\_bulk\_weighted\_interleave() caused by improper GFP flag usage in atomic context, letting kernel tasks trigger invalid context errors, exploit requires specific mempolicy and atomic context.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89986)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

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

Published

16 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for alloc\_pages\_bulk\_weighted\_interleave()

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-2026-89986](https://nvd.nist.gov/vuln/detail/CVE-2026-89986)
- [https://git.kernel.org/stable/c/bcb3d0c867ee40dc48e9c085bf328fbc679b6656](https://git.kernel.org/stable/c/bcb3d0c867ee40dc48e9c085bf328fbc679b6656)
- [https://git.kernel.org/stable/c/0ceda28f371df9e0bbdaa29214f71fe8298f23d8](https://git.kernel.org/stable/c/0ceda28f371df9e0bbdaa29214f71fe8298f23d8)
- [https://git.kernel.org/stable/c/2943f1f4b7f2816177060eb9f551f2e6d8b629ba](https://git.kernel.org/stable/c/2943f1f4b7f2816177060eb9f551f2e6d8b629ba)
- [https://git.kernel.org/stable/c/540e583b66d6402bf556fde5e53c817a54c1afe5](https://git.kernel.org/stable/c/540e583b66d6402bf556fde5e53c817a54c1afe5)

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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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