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
No CVSS.
References
Configurations
No configuration.
History
No history.
Information
Published : 2026-08-15 13:17
Updated : 2026-08-23 13:16
NVD link : CVE-2026-74487
Mitre link : CVE-2026-74487
CVE.ORG link : CVE-2026-74487
JSON object : View
Products Affected
No product.
CWE
No CWE.