---
id: CVE-2026-98775
title: >-
  kernel: nitro_enclaves: fix use-after-free on SLOT_ALLOC failure
  (CVE-2026-98775)
summary: >-
  A flaw was found in the Linux kernel's Nitro Enclaves driver. An
  error-handling defect during enclave creation allows memory to be accessed
  after it has already been freed. A local attacker could exploit this
  use-after-free condition to ca…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-825
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-10-18'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T08:07:24+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98775.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98775.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98775'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555087'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98775'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98775'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98775.mbox
  - url: 'https://git.kernel.org/stable/c/8bde6f643ab6fe5e3e3f4c312f84ce327ecf39b2'
  - url: 'https://git.kernel.org/stable/c/466041d14f26dc2babd606a2e85dce08774112a6'
  - url: 'https://git.kernel.org/stable/c/f7fb6c2835ede1b8ad84cf7e78a528a9d0159b84'
  - url: 'https://git.kernel.org/stable/c/43f78b328f3907ca2f7424e15b7e45ffbf9fe21c'
  - url: 'https://git.kernel.org/stable/c/9bc184a2eda8b773c88ecbff934001ad649b9cc1'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00168
epssPercentile: 0.06032
ingestedAt: '2026-10-18T16:47:32.491Z'
---

## Overview

A flaw was found in the Linux kernel's Nitro Enclaves driver. An error-handling defect during enclave creation allows memory to be accessed after it has already been freed. A local attacker could exploit this use-after-free condition to cause a system crash, resulting in a Denial of Service (DoS), or potentially escalate privileges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98775.json)

**kernel: nitro_enclaves: fix use-after-free on SLOT_ALLOC failure** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

Not affected:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7

## Remediation

Fix deferred