---
title: "CVE-2026-98083: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability in btrfs RAID stripe insertion caused by premature transaction handle freeing, letting attackers cause memory corruption or system instability, exploit requires local access."
url: https://panop.io/threat-heartbeat/CVE-2026-98083/
---

# CVE-2026-98083 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability in btrfs RAID stripe insertion caused by premature transaction handle freeing, letting attackers cause memory corruption or system instability, exploit requires local access.

CVSS base score 7.0 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.12% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-98083)

## Details

Type

Use After Free

Impact

Denial Of Service, Privilege Escalation

CVSS vector

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

Published

25 September 2026

Updated

15 October 2026

Weakness

[CWE-416](https://cwe.mitre.org/data/definitions/416.html)

## 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-2026-98083](https://nvd.nist.gov/vuln/detail/CVE-2026-98083)
- [https://git.kernel.org/stable/c/2fbfd02bdfe12b20bd3cc7a3190fb32e3f7072f5](https://git.kernel.org/stable/c/2fbfd02bdfe12b20bd3cc7a3190fb32e3f7072f5)
- [https://git.kernel.org/stable/c/a8813a923f9e43f788b357fb55c35f7f6ed6f98c](https://git.kernel.org/stable/c/a8813a923f9e43f788b357fb55c35f7f6ed6f98c)
- [https://git.kernel.org/stable/c/b185bdf30313e213fa1c887fe22fc3d513c061d9](https://git.kernel.org/stable/c/b185bdf30313e213fa1c887fe22fc3d513c061d9)
- [https://git.kernel.org/stable/c/b7b94923b3b5774d85a2a7c8d6eb9e3e0ef66685](https://git.kernel.org/stable/c/b7b94923b3b5774d85a2a7c8d6eb9e3e0ef66685)
- [https://git.kernel.org/stable/c/089d9c45ea49ffffe55a8fe08d0ce2536626e90a](https://git.kernel.org/stable/c/089d9c45ea49ffffe55a8fe08d0ce2536626e90a)

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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

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

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