---
title: "CVE-2026-89606: Linux Kernel - Out of Bounds Read/Write"
description: "Linux kernel contains a buffer underflow vulnerability in ecryptfs_parse_tag_70_packet caused by improper size calculation of tag 70 packets, letting attackers cause potential memory corruption, exploit requires crafted malformed packets."
url: https://panop.io/threat-heartbeat/CVE-2026-89606/
---

# CVE-2026-89606 Linux Kernel - Out of Bounds Read/Write

Linux kernel contains a buffer underflow vulnerability in ecryptfs\_parse\_tag\_70\_packet caused by improper size calculation of tag 70 packets, letting attackers cause potential memory corruption, exploit requires crafted malformed packets.

CVSS base score 7.8 /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-2026-89606)

## Details

Type

Out of Bounds Read/Write

Impact

Denial Of Service, Remote Code Execution

CVSS vector

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

Published

11 September 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-2026-89606](https://nvd.nist.gov/vuln/detail/CVE-2026-89606)
- [https://git.kernel.org/stable/c/9d88391bbed76eb091cddd50b0af87b1c6f22589](https://git.kernel.org/stable/c/9d88391bbed76eb091cddd50b0af87b1c6f22589)
- [https://git.kernel.org/stable/c/b31da1ecf13929a8d7f8d2727843d2fe35396b75](https://git.kernel.org/stable/c/b31da1ecf13929a8d7f8d2727843d2fe35396b75)
- [https://git.kernel.org/stable/c/d2869768eab5648e6edc05f47e0716e5328e6681](https://git.kernel.org/stable/c/d2869768eab5648e6edc05f47e0716e5328e6681)
- [https://git.kernel.org/stable/c/e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f](https://git.kernel.org/stable/c/e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f)
- [https://git.kernel.org/stable/c/2e5afed9503dd1d85004c09503adc2cb584c0188](https://git.kernel.org/stable/c/2e5afed9503dd1d85004c09503adc2cb584c0188)
- [https://git.kernel.org/stable/c/414a0f04feb06f03523edf7e2a8be1d7f1a9b160](https://git.kernel.org/stable/c/414a0f04feb06f03523edf7e2a8be1d7f1a9b160)
- [https://git.kernel.org/stable/c/5668121974eb7f7aa82793a9d0d13abadb8904dc](https://git.kernel.org/stable/c/5668121974eb7f7aa82793a9d0d13abadb8904dc)
- [https://git.kernel.org/stable/c/df5f375a6151ef71f636da044bcef90c26697255](https://git.kernel.org/stable/c/df5f375a6151ef71f636da044bcef90c26697255)

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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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