---
title: "CVE-2026-89799: Linux Kernel - Race Condition"
description: "Linux kernel contains a race condition caused by improper preemption handling in bpf_get_stackid, letting attackers cause denial of service or system instability, exploit requires kernel-level access."
url: https://panop.io/threat-heartbeat/CVE-2026-89799/
---

# CVE-2026-89799 Linux Kernel - Race Condition

Linux kernel contains a race condition caused by improper preemption handling in bpf\_get\_stackid, letting attackers cause denial of service or system instability, exploit requires kernel-level access.

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-2026-89799)

## Details

Type

Race Condition

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 with the fix for bpf\_get\_stackid preemption handling.

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-2026-89799](https://nvd.nist.gov/vuln/detail/CVE-2026-89799)
- [https://git.kernel.org/stable/c/c4efdc1d4cb3e9183e41a1b2a5e0901dbbb31cdf](https://git.kernel.org/stable/c/c4efdc1d4cb3e9183e41a1b2a5e0901dbbb31cdf)
- [https://git.kernel.org/stable/c/ccf481d73bce6e851cec364fe831c86fe66877cf](https://git.kernel.org/stable/c/ccf481d73bce6e851cec364fe831c86fe66877cf)
- [https://git.kernel.org/stable/c/18c71e4b65ee60b8611fc071bdd7159f10185117](https://git.kernel.org/stable/c/18c71e4b65ee60b8611fc071bdd7159f10185117)
- [https://git.kernel.org/stable/c/15f1bd8574662f1b7b26aaa2e23ebf4066f0117d](https://git.kernel.org/stable/c/15f1bd8574662f1b7b26aaa2e23ebf4066f0117d)

[← All CVEs](https://panop.io/threat-heartbeat/)

## 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

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)