---
title: "CVE-2026-89483: Linux kernel nvme - Information Disclosure"
description: "Linux kernel nvme contains an uninitialized memory disclosure caused by fallback discard page not being zeroed in nvme_setup_discard, letting attackers with memory pressure conditions leak kernel memory, exploit requires memory pressure causing allocation failure."
url: https://panop.io/threat-heartbeat/CVE-2026-89483/
---

# CVE-2026-89483 Linux kernel nvme - Information Disclosure

Linux kernel nvme contains an uninitialized memory disclosure caused by fallback discard page not being zeroed in nvme\_setup\_discard, letting attackers with memory pressure conditions leak kernel memory, exploit requires memory pressure causing allocation failure.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.57% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89483)

## Details

Type

Information Disclosure

Impact

Information Disclosure

CVSS vector

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

Published

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix that zeroes the fallback discard page.

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-2026-89483](https://nvd.nist.gov/vuln/detail/CVE-2026-89483)
- [https://git.kernel.org/stable/c/67551d8430df94c827e1830bd3a5fae1f66a5219](https://git.kernel.org/stable/c/67551d8430df94c827e1830bd3a5fae1f66a5219)
- [https://git.kernel.org/stable/c/bededeaaeff404978a5a8e2a605a6c3017cddd3e](https://git.kernel.org/stable/c/bededeaaeff404978a5a8e2a605a6c3017cddd3e)
- [https://git.kernel.org/stable/c/dc4d4b70a863f7e39ef8bd137634be4e6db8b084](https://git.kernel.org/stable/c/dc4d4b70a863f7e39ef8bd137634be4e6db8b084)
- [https://git.kernel.org/stable/c/f5827817b4fc7feeabf4f53fb4b626e6edc52fef](https://git.kernel.org/stable/c/f5827817b4fc7feeabf4f53fb4b626e6edc52fef)
- [https://git.kernel.org/stable/c/3f84d2bd0d8ae8c7e8e0f8fc3cbf018a282971a1](https://git.kernel.org/stable/c/3f84d2bd0d8ae8c7e8e0f8fc3cbf018a282971a1)
- [https://git.kernel.org/stable/c/415f2772ebcbc7f3f1ab1a71915dab82cee3465e](https://git.kernel.org/stable/c/415f2772ebcbc7f3f1ab1a71915dab82cee3465e)
- [https://git.kernel.org/stable/c/66b5af23b6f956e57f8205c46aa80b054631be34](https://git.kernel.org/stable/c/66b5af23b6f956e57f8205c46aa80b054631be34)
- [https://git.kernel.org/stable/c/76139b5bbf531e675934b97227be3521c7fdd537](https://git.kernel.org/stable/c/76139b5bbf531e675934b97227be3521c7fdd537)

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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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