---
id: CVE-2026-53210
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  tee: shm: fix shm leak in register_shm_helper()

  register_shm_helper() allocates shm before calling
  iov_iter_npages()
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  tee: shm: fix shm leak in register_shm_helper()

  register_shm_helper() allocates shm before calling
  iov_iter_npages(). If iov_iter_npages() returns 0, the function
  jump…
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'
cwe:
  - CWE-401
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.8, < 6.12.94'
  - 'linux_kernel >= 6.13, < 6.18.36'
  - 'linux_kernel >= 6.19, < 7.0.13'
  - linux_kernel = 7.1
patched:
  - linux_kernel 7.0.13
published: '2026-06-25'
updated: '2026-07-02'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53210'
references:
  - url: 'https://git.kernel.org/stable/c/26682f5efc276e3ad96d102019472bfbf03833b2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4277759906b44d923a38c8f59f5576501b187b0d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c10c9c48b2903f41ed4c532043b0576e86228236'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dbf779db927414f5b37c1f666013e9b48a88cfde'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00122
epssPercentile: 0.01727
ingestedAt: '2026-07-03T13:02:28.034Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

tee: shm: fix shm leak in register_shm_helper()

register_shm_helper() allocates shm before calling
iov_iter_npages(). If iov_iter_npages() returns 0, the function
jumps to err_ctx_put and leaks shm.

This can be triggered by TEE_IOC_SHM_REGISTER with
struct tee_ioctl_shm_register_data where length is 0.

Jump to err_free_shm instead.

## Affected

- `linux_kernel >= 6.8, < 6.12.94`
- `linux_kernel >= 6.13, < 6.18.36`
- `linux_kernel >= 6.19, < 7.0.13`
- `linux_kernel = 7.1`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.0.13`