Unknown

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

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.

Published Aug 15, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.18%

ahead of 7% of scored CVEs · Oct 29, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 948b701a607f123df92ed29084413e5dd8cda2ed and < 7873f987213695e3564c8c259e6db283e4739472≥ 948b701a607f123df92ed29084413e5dd8cda2ed and < 13efc628fdf641d901bdba07caa1c558e1bed046≥ 948b701a607f123df92ed29084413e5dd8cda2ed and < f1cf67f6be0babc73afa4ee0e27bdedffeeeb095≥ 948b701a607f123df92ed29084413e5dd8cda2ed and < dd9ba32169e73a3c3ba595cf1de1f4c69ceafb3c≥ 948b701a607f123df92ed29084413e5dd8cda2ed and < a50296cca2a1db9d8d21051e7d50f0cf3a4b7ec8≥ 948b701a607f123df92ed29084413e5dd8cda2ed and < fdc1d702bf3001586221fa07e598e876a0a854c5≥ 948b701a607f123df92ed29084413e5dd8cda2ed and < 3b522487a3a9162b1b519eefde7998d103e3e07b≥ 948b701a607f123df92ed29084413e5dd8cda2ed and < db1856ea9196cf6e015d12199a34c0b9313c7bfa and 1 more version 4.8	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 29, 2026 · 14 reading(s) · max 0.18%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 15, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/a50296cca2a1db9d8d21051e7d50f0cf3a4b7ec8
NIST National Vulnerability Database
git.kernel.org/stable/c/3b522487a3a9162b1b519eefde7998d103e3e07b
NIST National Vulnerability Database
git.kernel.org/stable/c/f1cf67f6be0babc73afa4ee0e27bdedffeeeb095
NIST National Vulnerability Database
git.kernel.org/stable/c/dd9ba32169e73a3c3ba595cf1de1f4c69ceafb3c
NIST National Vulnerability Database
git.kernel.org/stable/c/13efc628fdf641d901bdba07caa1c558e1bed046
NIST National Vulnerability Database
git.kernel.org/stable/c/7873f987213695e3564c8c259e6db283e4739472
NIST National Vulnerability Database
git.kernel.org/stable/c/fdc1d702bf3001586221fa07e598e876a0a854c5
NIST National Vulnerability Database
git.kernel.org/stable/c/db1856ea9196cf6e015d12199a34c0b9313c7bfa
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-99216 Drivers: hv: Don't reset VMBus connection state on error/exit paths 2d
Unknown CVE-2026-99215 power: supply: core: prevent unregistering a power supply while a callback runs 2d
Unknown CVE-2026-99207 scsi: target: Disable interrupts while holding delayed_cmd_lock 2d
Unknown CVE-2026-99208 drm/xe/oa: Zero OA buffer at allocation 2d
Unknown CVE-2026-99209 drm/xe: skip eviction of a BO with no resource 2d
Unknown CVE-2026-99210 accel/rocket: clear rdev on device init failure 2d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-74487 is "binfmt_misc: restore write access when removing an entry", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.18% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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