---
title: "CVE-2026-90069: Linux Kernel - Out of Bounds Write"
description: "Linux kernel contains a buffer overflow caused by insufficient allocation size in acomp_request_clone for async crypto requests, letting attackers cause out-of-bounds writes, exploit requires kernel-level access."
url: https://panop.io/threat-heartbeat/CVE-2026-90069/
---

# CVE-2026-90069 Linux Kernel - Out of Bounds Write

Linux kernel contains a buffer overflow caused by insufficient allocation size in acomp\_request\_clone for async crypto requests, letting attackers cause out-of-bounds writes, exploit requires kernel-level access.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90069)

## Details

Type

Out of Bounds Write

Impact

Denial Of Service, Privilege Escalation

CVSS vector

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

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version with the fix for acomp\_request\_clone allocation.

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-2026-90069](https://nvd.nist.gov/vuln/detail/CVE-2026-90069)
- [https://git.kernel.org/stable/c/889fa17a0af09ff93a9166abc82ee7a654faa49b](https://git.kernel.org/stable/c/889fa17a0af09ff93a9166abc82ee7a654faa49b)
- [https://git.kernel.org/stable/c/d48197cbd5d3476c7deea644972e9ec510865ec2](https://git.kernel.org/stable/c/d48197cbd5d3476c7deea644972e9ec510865ec2)
- [https://git.kernel.org/stable/c/ee440d4fc0d2f15894ab1f64c474a3adbc858880](https://git.kernel.org/stable/c/ee440d4fc0d2f15894ab1f64c474a3adbc858880)

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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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