---
title: "CVE-2026-97417: Linux Kernel - Memory Corruption"
description: "Linux kernel contains a buffer alignment vulnerability in netfilter nf_conntrack tcp_sack function caused by unsafe dereferencing of TCP option stream, letting attackers cause potential memory corruption, exploit requires crafted TCP packets."
url: https://panop.io/threat-heartbeat/CVE-2026-97417/
---

# CVE-2026-97417 Linux Kernel - Memory Corruption

Linux kernel contains a buffer alignment vulnerability in netfilter nf\_conntrack tcp\_sack function caused by unsafe dereferencing of TCP option stream, letting attackers cause potential memory corruption, exploit requires crafted TCP packets.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.49% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-97417)

## Details

Type

Memory Corruption

Impact

Denial Of Service

CVSS vector

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

Published

24 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the 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-2026-97417](https://nvd.nist.gov/vuln/detail/CVE-2026-97417)
- [https://git.kernel.org/stable/c/7ecfa46a536578a7ed335ddf31a854127268c27c](https://git.kernel.org/stable/c/7ecfa46a536578a7ed335ddf31a854127268c27c)
- [https://git.kernel.org/stable/c/d3bf9eae486490832bd08fd62ab0ac601f346bd4](https://git.kernel.org/stable/c/d3bf9eae486490832bd08fd62ab0ac601f346bd4)
- [https://git.kernel.org/stable/c/0d5ad732e4fdc569eb85861115e8f7b4c2c67852](https://git.kernel.org/stable/c/0d5ad732e4fdc569eb85861115e8f7b4c2c67852)
- [https://git.kernel.org/stable/c/55bcc3376cd7b18954cc9814da697504fdaf12bf](https://git.kernel.org/stable/c/55bcc3376cd7b18954cc9814da697504fdaf12bf)
- [https://git.kernel.org/stable/c/740ad3d17a281f7764dda4dbeb37cea52e2e31ae](https://git.kernel.org/stable/c/740ad3d17a281f7764dda4dbeb37cea52e2e31ae)
- [https://git.kernel.org/stable/c/a0523267de2523522b0f70972dd1ffa22ec6176c](https://git.kernel.org/stable/c/a0523267de2523522b0f70972dd1ffa22ec6176c)
- [https://git.kernel.org/stable/c/4abc1af7ac209c066f4e5dd75cdd56876e5829a9](https://git.kernel.org/stable/c/4abc1af7ac209c066f4e5dd75cdd56876e5829a9)

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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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