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CVE-2026-74487
binfmt_misc: restore write access when removing an entry
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: binfmt_misc: restore write access when removing an entry Registering an entry with the MISC_FMT_OPEN_FILE flag opens the interpreter via open_exec() which denies write access to it for as long as the entry exists. Removing the entry closes the interpreter file via filp_close() but never restores write access, leaving the inode's i_writecount permanently negative. Opening the interpreter for writing keeps failing with ETXTBSY long after the entry is gone until the inode is evicted from the inode cache. Commit 90f601b497d7 ("binfmt_misc: restore write access before closing files opened by open_exec()") fixed the same imbalance in the error path of bm_register_write() but the actual removal path has been leaking the write denial since the introduction of the flag. Restore write access in put_binfmt_handler() before closing the interpreter file.

Details
INFO

Published Date :

Aug. 15, 2026, 1:17 p.m.

Last Modified :

Aug. 23, 2026, 1:16 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-74487 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Fix incorrect write access restoration after unregistering binfmt_misc entries.
  • Apply the kernel patch to restore write access.
  • Update the Linux kernel to the latest stable version.
  • Reboot the system after applying kernel updates.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-74487.

URL Resource
https://git.kernel.org/stable/c/13efc628fdf641d901bdba07caa1c558e1bed046
https://git.kernel.org/stable/c/3b522487a3a9162b1b519eefde7998d103e3e07b
https://git.kernel.org/stable/c/7873f987213695e3564c8c259e6db283e4739472
https://git.kernel.org/stable/c/a50296cca2a1db9d8d21051e7d50f0cf3a4b7ec8
https://git.kernel.org/stable/c/db1856ea9196cf6e015d12199a34c0b9313c7bfa
https://git.kernel.org/stable/c/dd9ba32169e73a3c3ba595cf1de1f4c69ceafb3c
https://git.kernel.org/stable/c/f1cf67f6be0babc73afa4ee0e27bdedffeeeb095
https://git.kernel.org/stable/c/fdc1d702bf3001586221fa07e598e876a0a854c5
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-74487 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-74487 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-74487 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-74487 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 23, 2026

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/13efc628fdf641d901bdba07caa1c558e1bed046
    Added Reference https://git.kernel.org/stable/c/7873f987213695e3564c8c259e6db283e4739472
    Added Reference https://git.kernel.org/stable/c/a50296cca2a1db9d8d21051e7d50f0cf3a4b7ec8
    Added Reference https://git.kernel.org/stable/c/dd9ba32169e73a3c3ba595cf1de1f4c69ceafb3c
    Added Reference https://git.kernel.org/stable/c/f1cf67f6be0babc73afa4ee0e27bdedffeeeb095
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': 'fdc1d702bf3001586221fa07e598e876a0a854c5', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': '3b522487a3a9162b1b519eefde7998d103e3e07b', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': 'db1856ea9196cf6e015d12199a34c0b9313c7bfa', 'versionType': 'git'}], 'programFiles': ['fs/binfmt_misc.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/binfmt_misc.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': '7873f987213695e3564c8c259e6db283e4739472', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': '13efc628fdf641d901bdba07caa1c558e1bed046', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': 'f1cf67f6be0babc73afa4ee0e27bdedffeeeb095', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': 'dd9ba32169e73a3c3ba595cf1de1f4c69ceafb3c', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': 'a50296cca2a1db9d8d21051e7d50f0cf3a4b7ec8', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': 'fdc1d702bf3001586221fa07e598e876a0a854c5', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': '3b522487a3a9162b1b519eefde7998d103e3e07b', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': 'db1856ea9196cf6e015d12199a34c0b9313c7bfa', 'versionType': 'git'}], 'programFiles': ['fs/binfmt_misc.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.266', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.217', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.184', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.153', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.105', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/binfmt_misc.c'], 'defaultStatus': 'affected'}]
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': 'fdc1d702bf3001586221fa07e598e876a0a854c5', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': '3b522487a3a9162b1b519eefde7998d103e3e07b', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': 'db1856ea9196cf6e015d12199a34c0b9313c7bfa', 'versionType': 'git'}], 'programFiles': ['fs/binfmt_misc.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/binfmt_misc.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': 'fdc1d702bf3001586221fa07e598e876a0a854c5', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': '3b522487a3a9162b1b519eefde7998d103e3e07b', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': 'db1856ea9196cf6e015d12199a34c0b9313c7bfa', 'versionType': 'git'}], 'programFiles': ['fs/binfmt_misc.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/binfmt_misc.c'], 'defaultStatus': 'affected'}]
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 15, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': 'fdc1d702bf3001586221fa07e598e876a0a854c5', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': '3b522487a3a9162b1b519eefde7998d103e3e07b', 'versionType': 'git'}, {'status': 'affected', 'version': '948b701a607f123df92ed29084413e5dd8cda2ed', 'lessThan': 'db1856ea9196cf6e015d12199a34c0b9313c7bfa', 'versionType': 'git'}], 'programFiles': ['fs/binfmt_misc.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/binfmt_misc.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: binfmt_misc: restore write access when removing an entry Registering an entry with the MISC_FMT_OPEN_FILE flag opens the interpreter via open_exec() which denies write access to it for as long as the entry exists. Removing the entry closes the interpreter file via filp_close() but never restores write access, leaving the inode's i_writecount permanently negative. Opening the interpreter for writing keeps failing with ETXTBSY long after the entry is gone until the inode is evicted from the inode cache. Commit 90f601b497d7 ("binfmt_misc: restore write access before closing files opened by open_exec()") fixed the same imbalance in the error path of bm_register_write() but the actual removal path has been leaking the write denial since the introduction of the flag. Restore write access in put_binfmt_handler() before closing the interpreter file.
    Added Reference https://git.kernel.org/stable/c/3b522487a3a9162b1b519eefde7998d103e3e07b
    Added Reference https://git.kernel.org/stable/c/db1856ea9196cf6e015d12199a34c0b9313c7bfa
    Added Reference https://git.kernel.org/stable/c/fdc1d702bf3001586221fa07e598e876a0a854c5
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
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