CVE-2026-74487binfmt_misc: restore write access when removing an entry
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 948b701a607f123df92ed29084413e5dd8cda2ed before 7873f987213695e3564c8c259e6db283e4739472; 948b701a607f123df92ed29084413e5dd8cda2ed builds before 13efc628fdf641d901bdba07caa1c558e1bed046; from 948b701a607f123df92ed29084413e5dd8cda2ed before f1cf67f6be0babc73afa4ee0e27bdedffeeeb095; from 948b701a607f123df92ed29084413e5dd8cda2ed before dd9ba32169e73a3c3ba595cf1de1f4c69ceafb3c; from 948b701a607f123df92ed29084413e5dd8cda2ed before a50296cca2a1db9d8d21051e7d50f0cf3a4b7ec8; from 948b701a607f123df92ed29084413e5dd8cda2ed before fdc1d702bf3001586221fa07e598e876a0a854c5; 948b701a607f123df92ed29084413e5dd8cda2ed builds before 3b522487a3a9162b1b519eefde7998d103e3e07b; from 948b701a607f123df92ed29084413e5dd8cda2ed before db1856ea9196cf6e015d12199a34c0b9313c7bfa | CNA record |
References
- https://git.kernel.org/stable/c/7873f987213695e3564c8c259e6db283e4739472
- https://git.kernel.org/stable/c/13efc628fdf641d901bdba07caa1c558e1bed046
- https://git.kernel.org/stable/c/f1cf67f6be0babc73afa4ee0e27bdedffeeeb095
- https://git.kernel.org/stable/c/dd9ba32169e73a3c3ba595cf1de1f4c69ceafb3c
- https://git.kernel.org/stable/c/a50296cca2a1db9d8d21051e7d50f0cf3a4b7ec8
- https://git.kernel.org/stable/c/fdc1d702bf3001586221fa07e598e876a0a854c5
- https://git.kernel.org/stable/c/3b522487a3a9162b1b519eefde7998d103e3e07b
- https://git.kernel.org/stable/c/db1856ea9196cf6e015d12199a34c0b9313c7bfa
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.