---
cve: "CVE-2026-74487"
severity: "LOW"
cvss: 3.1
epss: "17%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-15 12:27:18"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-05T19:20:41+02:00"
---

# CVE-2026-74487

> 3.1 LOW

## Beschreibung

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.

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.266
- Kernel ≥ 5.15.217
- Kernel ≥ 6.1.184
- Kernel ≥ 6.6.153
- Kernel ≥ 6.12.105
- Kernel ≥ 6.18.44
- Kernel ≥ 7.1.8

## Referenzen

- <https://git.kernel.org/stable/c/fdc1d702bf3001586221fa07e598e876a0a854c5>
- <https://git.kernel.org/stable/c/3b522487a3a9162b1b519eefde7998d103e3e07b>
- <https://git.kernel.org/stable/c/db1856ea9196cf6e015d12199a34c0b9313c7bfa>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-74487) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_