---
title: "CVE-2026-89583: Linux Kernel - Out-of-Bounds Read"
description: "Linux kernel contains an out-of-bounds read in Bluetooth eir_get_service_data() caused by incorrect length calculation in advertising data parsing, letting attackers cause memory disclosure via ISO broadcast sink, exploit requires crafted periodic advertising reports."
url: https://panop.io/threat-heartbeat/CVE-2026-89583/
---

# CVE-2026-89583 Linux Kernel - Out-of-Bounds Read

Linux kernel contains an out-of-bounds read in Bluetooth eir\_get\_service\_data() caused by incorrect length calculation in advertising data parsing, letting attackers cause memory disclosure via ISO broadcast sink, exploit requires crafted periodic advertising reports.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.27% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89583)

## Details

Type

Out-of-Bounds Read

Impact

Information Disclosure

CVSS vector

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

Published

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for eir\_get\_service\_data()

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-2026-89583](https://nvd.nist.gov/vuln/detail/CVE-2026-89583)
- [https://git.kernel.org/stable/c/4beb198bc59b242404a47c21990bc84165052c8a](https://git.kernel.org/stable/c/4beb198bc59b242404a47c21990bc84165052c8a)
- [https://git.kernel.org/stable/c/815fc98c227a78cbd93d4c29f2833705b7c2bc0f](https://git.kernel.org/stable/c/815fc98c227a78cbd93d4c29f2833705b7c2bc0f)
- [https://git.kernel.org/stable/c/bb56e97bd67614238c1c0a4084704ccadbb875b4](https://git.kernel.org/stable/c/bb56e97bd67614238c1c0a4084704ccadbb875b4)
- [https://git.kernel.org/stable/c/c21fa79301d7d6ac0a4ec6c51e8ba10beaa08c50](https://git.kernel.org/stable/c/c21fa79301d7d6ac0a4ec6c51e8ba10beaa08c50)
- [https://git.kernel.org/stable/c/1a28aae7f1fc8c06c0d02f153541be4fc7bacb74](https://git.kernel.org/stable/c/1a28aae7f1fc8c06c0d02f153541be4fc7bacb74)
- [https://git.kernel.org/stable/c/b6902adf81ea2ce14b1040dd97b6980050a8125a](https://git.kernel.org/stable/c/b6902adf81ea2ce14b1040dd97b6980050a8125a)

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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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