CVE-2025-68239

NameCVE-2025-68239
DescriptionIn 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.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)bullseye5.10.223-1vulnerable
bullseye (security)5.10.247-1vulnerable
bookworm6.1.148-1vulnerable
bookworm (security)6.1.158-1vulnerable
trixie6.12.57-1vulnerable
trixie (security)6.12.48-1vulnerable
forky6.17.11-1fixed
sid6.17.12-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)6.17.9-1

Notes

https://git.kernel.org/linus/90f601b497d76f40fa66795c3ecf625b6aced9fd (6.18-rc7)

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