---
id: CVE-2026-28529
title: >-
  cryptodev-linux version 1.14 and prior contain a page reference handling flaw
  in the get_userbuf function of the /dev/crypto device driver that allows local
  users to trigger use-after-free conditions
summary: >-
  cryptodev-linux version 1.14 and prior contain a page reference handling flaw
  in the get_userbuf function of the /dev/crypto device driver that allows local
  users to trigger use-after-free conditions. Attackers with access to the
  /dev/cr…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: cryptodev-linux
product: cryptodev-linux
affected:
  - cryptodev-linux <= 1.14
published: '2026-03-25'
updated: '2026-08-17'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-28529'
references:
  - url: 'https://gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/cryptodev-linux/cryptodev-linux/pull/104'
    label: disclosure@vulncheck.com
  - url: 'https://nasm.re/posts/cryptodev-linux-vuln/'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpe
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00174
epssPercentile: 0.07213
ingestedAt: '2026-08-17T18:59:02.829Z'
---

## Overview

cryptodev-linux version 1.14 and prior contain a page reference handling flaw in the get_userbuf function of the /dev/crypto device driver that allows local users to trigger use-after-free conditions. Attackers with access to the /dev/crypto interface can repeatedly decrement reference counts of controlled pages to achieve local privilege escalation.

## Affected

- `cryptodev-linux <= 1.14`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.