CVE-2026-74487 | 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
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.
- 🔗 git.kernel.org/stable/c/fdc1d702bf3001586221fa07e598e876…
- 🔗 git.kernel.org/stable/c/3b522487a3a9162b1b519eefde7998d1…
- 🔗 git.kernel.org/stable/c/db1856ea9196cf6e015d12199a34c0b9…
- 🔗 git.kernel.org/stable/c/13efc628fdf641d901bdba07caa1c558…
- 🔗 git.kernel.org/stable/c/7873f987213695e3564c8c259e6db283…
- 🔗 git.kernel.org/stable/c/a50296cca2a1db9d8d21051e7d50f0cf…
- 🔗 git.kernel.org/stable/c/dd9ba32169e73a3c3ba595cf1de1f4c6…
- 🔗 git.kernel.org/stable/c/f1cf67f6be0babc73afa4ee0e27bdedf…
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CVE-2026-74487 | 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
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 ac