---
title: "CVE-2026-89932: Linux Kernel KVM - Information Disclosure"
description: "Linux kernel KVM nVMX contains a vulnerability caused by not flushing vpid02 on first use, letting attackers cause stale TLB entries to be used, potentially leading to information leakage or VM isolation bypass, exploit requires nested VMX usage with VMXOFF -> VMXON sequence."
url: https://panop.io/threat-heartbeat/CVE-2026-89932/
---

# CVE-2026-89932 Linux Kernel KVM - Information Disclosure

Linux kernel KVM nVMX contains a vulnerability caused by not flushing vpid02 on first use, letting attackers cause stale TLB entries to be used, potentially leading to information leakage or VM isolation bypass, exploit requires nested VMX usage with VMXOFF -> VMXON sequence.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89932)

## Details

Type

Information Disclosure

Impact

Information Disclosure

CVSS vector

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

Published

16 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for vpid02 flushing on first use.

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-2026-89932](https://nvd.nist.gov/vuln/detail/CVE-2026-89932)
- [https://git.kernel.org/stable/c/121991d150735f3c0f7401678ce4d35c5b4ac898](https://git.kernel.org/stable/c/121991d150735f3c0f7401678ce4d35c5b4ac898)
- [https://git.kernel.org/stable/c/22dfcc22c95e91295119a1c3b469816ce44c4804](https://git.kernel.org/stable/c/22dfcc22c95e91295119a1c3b469816ce44c4804)
- [https://git.kernel.org/stable/c/26de0d2d9a8d14c03e5ebb25fd68b5bfcd5ac366](https://git.kernel.org/stable/c/26de0d2d9a8d14c03e5ebb25fd68b5bfcd5ac366)
- [https://git.kernel.org/stable/c/62604376c313178811375f40a282fc2a46cd2311](https://git.kernel.org/stable/c/62604376c313178811375f40a282fc2a46cd2311)
- [https://git.kernel.org/stable/c/8b98d662ab24f34710a56e03bc9169e4a5508606](https://git.kernel.org/stable/c/8b98d662ab24f34710a56e03bc9169e4a5508606)
- [https://git.kernel.org/stable/c/8bc609999ec223089fec8d74c7de27d689606b36](https://git.kernel.org/stable/c/8bc609999ec223089fec8d74c7de27d689606b36)
- [https://git.kernel.org/stable/c/f0772389413dce9657c7d6950abf3edbbd511356](https://git.kernel.org/stable/c/f0772389413dce9657c7d6950abf3edbbd511356)

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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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