Description
In the Linux kernel, the following vulnerability has been resolved:
binfmt_misc: restore write access before closing files opened by open_exec()
bm_register_write() opens an executable file using open_exec(), which internally calls do_open_execat() and denies write access on the file to avoid modification while it is being executed.
However, when an error occurs, bm_register_write() closes the file using filp_close() directly. This does not restore the write permission, which may cause subsequent write operations on the same file to fail.
Fix this by calling exe_file_allow_write_access() before filp_close() to restore the write permission properly.
Metrics
No CVSS score has been published yet.
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= e7850f4d844e0acfac7e570af611d89deade3146, < 54274ff90488b6c0f595a6518faed3cf0bc966eb; >= e7850f4d844e0acfac7e570af611d89deade3146, < 480ac88431703f2adbb8e6b5bd73c3f3cf9f3d7f; >= e7850f4d844e0acfac7e570af611d89deade3146, < fbab8c08e1a6dbaef81e22d672a7647553101d16; >= e7850f4d844e0acfac7e570af611d89deade3146, < 6cce7bc7fac8471c832696720d9c8f2a976d9c54; >= e7850f4d844e0acfac7e570af611d89deade3146, < e785f552ab04dbca01d31f0334f4561240b04459; >= e7850f4d844e0acfac7e570af611d89deade3146, < 90f601b497d76f40fa66795c3ecf625b6aced9fd; 467a50d5db7deaf656e18a1f633be9ecd94b393a; 4a8b4124ea4156ca52918b66c750a69c6d932aa5; 3fe116e33a855bbfdd32dc207e9be2a41e3ed3a6; c0e0ab60d0b15469e69db93215dad009999f5a5b; 5ab9464a2a3c538eedbb438f1802f2fd98d0953f; d28492be82e19fc69cc69975fc2052b37ef0c821; >= 4.9.262, < 4.10; >= 4.14.226, < 4.15; >= 4.19.181, < 4.20; >= 5.4.106, < 5.5; >= 5.10.24, < 5.11; >= 5.11.7, < 5.12 |
| Linux | Linux | 5.12 |
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | < * |
References
- https://git.kernel.org/stable/c/480ac88431703f2adbb8e6b5bd73c3f3cf9f3d7f
- https://git.kernel.org/stable/c/54274ff90488b6c0f595a6518faed3cf0bc966eb
- https://git.kernel.org/stable/c/6cce7bc7fac8471c832696720d9c8f2a976d9c54
- https://git.kernel.org/stable/c/90f601b497d76f40fa66795c3ecf625b6aced9fd
- https://git.kernel.org/stable/c/e785f552ab04dbca01d31f0334f4561240b04459
- https://git.kernel.org/stable/c/fbab8c08e1a6dbaef81e22d672a7647553101d16
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
Timeline
- Published
- Dec 16, 2025
- Last modified
- Oct 15, 2026
- NVD status
- Deferred