---
title: "CVE-2026-90205: Linux Kernel OCFS2 - Use After Free"
description: "Linux kernel OCFS2 contains a use-after-free vulnerability caused by lack of validation of active orphan slots during inode read, letting attackers cause out-of-bounds memory access, exploit requires corrupted dinode with OCFS2_ORPHANED_FL flag."
url: https://panop.io/threat-heartbeat/CVE-2026-90205/
---

# CVE-2026-90205 Linux Kernel OCFS2 - Use After Free

Linux kernel OCFS2 contains a use-after-free vulnerability caused by lack of validation of active orphan slots during inode read, letting attackers cause out-of-bounds memory access, exploit requires corrupted dinode with OCFS2\_ORPHANED\_FL flag.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.18% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90205)

## Details

Type

Use After Free

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 containing the patch that validates active orphan slots during inode read.

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-2026-90205](https://nvd.nist.gov/vuln/detail/CVE-2026-90205)
- [https://git.kernel.org/stable/c/3d7c4b7ce7b4baedfd8699fa692cd95f77d332de](https://git.kernel.org/stable/c/3d7c4b7ce7b4baedfd8699fa692cd95f77d332de)
- [https://git.kernel.org/stable/c/b2d31acbd3b182755b019183fb46949ba5e39b9f](https://git.kernel.org/stable/c/b2d31acbd3b182755b019183fb46949ba5e39b9f)
- [https://git.kernel.org/stable/c/c6c908f9b4edfb04534b15573168ae038f7a9cbf](https://git.kernel.org/stable/c/c6c908f9b4edfb04534b15573168ae038f7a9cbf)

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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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