---
id: CVE-2026-74486
title: 'binfmt_misc: use exe_file_deny_write_access() for the interpreter clone'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  binfmt_misc: use exe_file_deny_write_access() for the interpreter clone

  For MISC_FMT_OPEN_FILE entries load_misc_binary() clones the
  registered interpreter file and de…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 5b432413f7bbbc8b935138490a57be05c1921684 <
    c65eb018c12179b5e2c7afe1f0956298576fecec
  - >-
    Linux >= bb4715098d8e340bbbdd3a874b31f89867c8067e <
    2bd860b7e752a51185960143cab9fec7bf32c84e
  - >-
    Linux >= c152be5adc0975c75cc4f50891c9072d52d60b47 <
    eea4b7c7711b1e425272d23352af157f45f4c3e3
  - >-
    Linux >= bf5ed2ef5cdb7b47ce606e3d48ea6eb803b31503 <
    2fdf8b07bee5ef99ec77773a6be05fbb8ee5cdb9
  - >-
    Linux >= 483217fd6f7ccd98b3ed2531a54f75ed144b4499 <
    f1e7ea3c8e070f19771cdaef55bbeda1359ad490
  - >-
    Linux >= 0357ef03c94ef835bd44a0658b8edb672a9dbf51 <
    255a758697da87a205e072e0cfc35897b8f743b1
  - >-
    Linux >= 0357ef03c94ef835bd44a0658b8edb672a9dbf51 <
    f0edbaf487e4653a680a7abb91c1df94cb7886aa
  - >-
    Linux >= 0357ef03c94ef835bd44a0658b8edb672a9dbf51 <
    fa5990ca8fd917003e526036bcc50413edb9722c
  - Linux 6.14
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:58:04.544658Z'
published: '2026-08-15'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T17:05:47.188Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-74486'
references:
  - url: 'https://git.kernel.org/stable/c/c65eb018c12179b5e2c7afe1f0956298576fecec'
  - url: 'https://git.kernel.org/stable/c/2bd860b7e752a51185960143cab9fec7bf32c84e'
  - url: 'https://git.kernel.org/stable/c/eea4b7c7711b1e425272d23352af157f45f4c3e3'
  - url: 'https://git.kernel.org/stable/c/2fdf8b07bee5ef99ec77773a6be05fbb8ee5cdb9'
  - url: 'https://git.kernel.org/stable/c/f1e7ea3c8e070f19771cdaef55bbeda1359ad490'
  - url: 'https://git.kernel.org/stable/c/255a758697da87a205e072e0cfc35897b8f743b1'
  - url: 'https://git.kernel.org/stable/c/f0edbaf487e4653a680a7abb91c1df94cb7886aa'
  - url: 'https://git.kernel.org/stable/c/fa5990ca8fd917003e526036bcc50413edb9722c'
tags:
  - cve.org
epss: 0.00177
epssPercentile: 0.07232
ingestedAt: '2026-11-06T18:00:12.553Z'
---

## Overview

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

binfmt_misc: use exe_file_deny_write_access() for the interpreter clone

For MISC_FMT_OPEN_FILE entries load_misc_binary() clones the
registered interpreter file and denies write access to the clone via
plain deny_write_access(). The clone is installed as
bprm->interpreter and later released by the exec machinery through
exe_file_allow_write_access() which skips the i_writecount increment
for files with FMODE_FSNOTIFY_HSM set.

The deny and allow side can therefore come to different conclusions
when pre-content watches are in play: if a pre-content watch is added
to the interpreter after registration every subsequent exec through
that entry takes a write denial on the clone that is never paired
with a write allowance, driving the interpreter inode's i_writecount
further down with each exec and leaving the interpreter unwritable
even after the entry and all its users are gone.

Take the write denial via exe_file_deny_write_access() so both sides
of the pairing base their decision on the same file mode, and
propagate failure instead of silently ignoring it: an interpreter
that is concurrently open for writing now fails the exec with
ETXTBSY, exactly like an interpreter freshly opened via open_exec()
would.

## Affected

- `Linux >= 5b432413f7bbbc8b935138490a57be05c1921684 < c65eb018c12179b5e2c7afe1f0956298576fecec`
- `Linux >= bb4715098d8e340bbbdd3a874b31f89867c8067e < 2bd860b7e752a51185960143cab9fec7bf32c84e`
- `Linux >= c152be5adc0975c75cc4f50891c9072d52d60b47 < eea4b7c7711b1e425272d23352af157f45f4c3e3`
- `Linux >= bf5ed2ef5cdb7b47ce606e3d48ea6eb803b31503 < 2fdf8b07bee5ef99ec77773a6be05fbb8ee5cdb9`
- `Linux >= 483217fd6f7ccd98b3ed2531a54f75ed144b4499 < f1e7ea3c8e070f19771cdaef55bbeda1359ad490`
- `Linux >= 0357ef03c94ef835bd44a0658b8edb672a9dbf51 < 255a758697da87a205e072e0cfc35897b8f743b1`
- `Linux >= 0357ef03c94ef835bd44a0658b8edb672a9dbf51 < f0edbaf487e4653a680a7abb91c1df94cb7886aa`
- `Linux >= 0357ef03c94ef835bd44a0658b8edb672a9dbf51 < fa5990ca8fd917003e526036bcc50413edb9722c`
- `Linux 6.14`

## Remediation

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