---
id: CVE-2026-93786
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ksmbd: preserve VFS inherited POSIX ACL mask

  The VFS initializes a child's POSIX ACL from the parent's default ACL and
  the requested creation mode
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ksmbd: preserve VFS inherited POSIX ACL mask

  The VFS initializes a child's POSIX ACL from the parent's default ACL and
  the requested creation mode. Do not mutate the p…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    591acf171644de590cda245fd8595b473a1beb70
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    0093909becbda22b62b39b654dbc607faed59cd0
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    e148e567a9252643baa125cb65d7ae9c2c6cf68a
  - Linux < 6.12.111
  - Linux < 6.18.53
  - Linux (all versions)
published: '2026-09-24'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T17:17:11.243'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93786'
references:
  - url: 'https://git.kernel.org/stable/c/0093909becbda22b62b39b654dbc607faed59cd0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/591acf171644de590cda245fd8595b473a1beb70'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e148e567a9252643baa125cb65d7ae9c2c6cf68a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T16:47:15.903Z'
---

## Overview

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

ksmbd: preserve VFS inherited POSIX ACL mask

The VFS initializes a child's POSIX ACL from the parent's default ACL and
the requested creation mode. Do not mutate the parent ACL or overwrite the
child's VFS-computed access and default ACLs afterwards.

This preserves restrictive ACL_MASK entries and prevents SMB object creation
from widening effective permissions.

## Remediation

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