CVE-2025-68239

Published: December 17, 2025Last modified: December 17, 2025

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.

Status

References

• https://git.kernel.org/stable/c/90f601b497d76f40fa66795c3ecf625b6aced9fd
• https://git.kernel.org/stable/c/e785f552ab04dbca01d31f0334f4561240b04459