---
title: "CVE-2026-98283: Linux Kernel KVM PPC Book3S HV - Use After Free"
description: "Linux kernel KVM PPC Book3S HV contains a use-after-free vulnerability caused by improper reference handling in kvmhv_emulate_tlbie_all_lpid(), letting concurrent vCPUs access freed memory, exploit requires concurrent nested guest vCPU execution."
url: https://panop.io/threat-heartbeat/CVE-2026-98283/
---

# CVE-2026-98283 Linux Kernel KVM PPC Book3S HV - Use After Free

Linux kernel KVM PPC Book3S HV contains a use-after-free vulnerability caused by improper reference handling in kvmhv\_emulate\_tlbie\_all\_lpid(), letting concurrent vCPUs access freed memory, exploit requires concurrent nested guest vCPU execution.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.14% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-98283)

## Details

Type

Use After Free

Impact

Remote Code Execution, Denial Of Service

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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.

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-2026-98283](https://nvd.nist.gov/vuln/detail/CVE-2026-98283)
- [https://git.kernel.org/stable/c/fbf69b7d0555ee83c871f58750770f74b7179ad1](https://git.kernel.org/stable/c/fbf69b7d0555ee83c871f58750770f74b7179ad1)
- [https://git.kernel.org/stable/c/24b634852413229bb8340d908b115c3365f3a247](https://git.kernel.org/stable/c/24b634852413229bb8340d908b115c3365f3a247)
- [https://git.kernel.org/stable/c/4d8f7b1f586375df8bce23a0909566ad5e852259](https://git.kernel.org/stable/c/4d8f7b1f586375df8bce23a0909566ad5e852259)
- [https://git.kernel.org/stable/c/51938dfa8a51a4f85328413fca9b6e21f9d2d088](https://git.kernel.org/stable/c/51938dfa8a51a4f85328413fca9b6e21f9d2d088)
- [https://git.kernel.org/stable/c/e37fba1ba69385cff2d0e60b371ee19e7d1852d1](https://git.kernel.org/stable/c/e37fba1ba69385cff2d0e60b371ee19e7d1852d1)
- [https://git.kernel.org/stable/c/ec2d7a52b3996ae81131617b4afc0af31583c1b4](https://git.kernel.org/stable/c/ec2d7a52b3996ae81131617b4afc0af31583c1b4)

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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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