---
title: "CVE-2026-98230: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability caused by improper list deletion in xfrm state_cache and state_cache_input, letting attackers cause memory corruption and potential read/write use-after-free, exploit requires triggering double __xfrm_state_delete calls."
url: https://panop.io/threat-heartbeat/CVE-2026-98230/
---

# CVE-2026-98230 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability caused by improper list deletion in xfrm state\_cache and state\_cache\_input, letting attackers cause memory corruption and potential read/write use-after-free, exploit requires triggering double \_\_xfrm\_state\_delete calls.

CVSS base score 7.0 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.12% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-98230)

## Details

Type

Use After Free

Impact

Remote Code Execution, Denial Of Service

CVSS vector

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

Published

6 October 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for xfrm state\_cache and state\_cache\_input list deletion.

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-2026-98230](https://nvd.nist.gov/vuln/detail/CVE-2026-98230)
- [https://git.kernel.org/stable/c/2afb8dc1f4390f164db8352f8e685e126e9db566](https://git.kernel.org/stable/c/2afb8dc1f4390f164db8352f8e685e126e9db566)
- [https://git.kernel.org/stable/c/4748c27e2e6a1969e02f1df46e62f79d2799b80b](https://git.kernel.org/stable/c/4748c27e2e6a1969e02f1df46e62f79d2799b80b)
- [https://git.kernel.org/stable/c/9b74a47a4cbd0d29faff4f3b199212c73e6b6220](https://git.kernel.org/stable/c/9b74a47a4cbd0d29faff4f3b199212c73e6b6220)
- [https://git.kernel.org/stable/c/fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5](https://git.kernel.org/stable/c/fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5)

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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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