---
title: "CVE-2026-98050: Linux Kernel mlxsw spectrum_ptp - Race Condition"
description: "Linux kernel contains a race condition in mlxsw spectrum_ptp component caused by unsafe concurrent calls to napi_gro_receive() from GC workqueue context, letting attackers cause kernel panic and denial of service, exploit requires triggering unmatched PTP entries during concurrent NAPI poll."
url: https://panop.io/threat-heartbeat/CVE-2026-98050/
---

# CVE-2026-98050 Linux Kernel mlxsw spectrum\_ptp - Race Condition

Linux kernel contains a race condition in mlxsw spectrum\_ptp component caused by unsafe concurrent calls to napi\_gro\_receive() from GC workqueue context, letting attackers cause kernel panic and denial of service, exploit requires triggering unmatched PTP entries during concurrent NAPI poll.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-98050)

## Details

Type

Race Condition

Impact

Denial Of Service

CVSS vector

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

Published

25 September 2026

Updated

15 October 2026

Weakness

[CWE-362](https://cwe.mitre.org/data/definitions/362.html)

## Vendor fix

Update to the latest Linux kernel version containing the patch for mlxsw spectrum\_ptp napi\_gro\_receive() call fix.

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-2026-98050](https://nvd.nist.gov/vuln/detail/CVE-2026-98050)
- [https://git.kernel.org/stable/c/2ac174dfcdde399fa95ba889541fb5e688d8bb35](https://git.kernel.org/stable/c/2ac174dfcdde399fa95ba889541fb5e688d8bb35)
- [https://git.kernel.org/stable/c/4375b3d1c2898886df1f908160c7004bdd938e73](https://git.kernel.org/stable/c/4375b3d1c2898886df1f908160c7004bdd938e73)
- [https://git.kernel.org/stable/c/7ddcc460176eb34f9bc5bda3cc274d0d24dc62a9](https://git.kernel.org/stable/c/7ddcc460176eb34f9bc5bda3cc274d0d24dc62a9)

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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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