CVE-2025-38396
In the Linux kernel, the following vulnerability has been resolved: fs: export anon_inode_make_secure_inode() and fix secretmem LSM bypass Export anon_inode_ma…
Impact
In the Linux kernel, the following vulnerability has been resolved: fs: export anon_inode_make_secure_inode() and fix secretmem LSM bypass Export anon_inode_make_secure_inode() to allow KVM guest_memfd to create anonymous inodes with proper security context. This replaces the current pattern of calling alloc_anon_inode() followed by inode_init_security_anon() for creating security context manually. This change also fixes a security regression in secretmem where the S_PRIVATE flag was not cleared after alloc_anon_inode(), causing LSM/SELinux checks to be bypassed for secretmem file descriptors. As guest_memfd currently resides in the KVM module, we need to export this symbol for use outside the core kernel. In the future, guest_memfd might be moved to core-mm, at which point the symbols no longer would have to be exported. When/if that happens is still unclear.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 6.0 before 6.1.146 from 6.2 before 6.6.97 from 6.7 before 6.12.37 from 6.13 before 6.15.6 Version 6.16 |
| Debian | Debian Linux | Version 11.0 |
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/66d29d757c968d2bee9124816da5d718eb352959
- https://git.kernel.org/stable/c/6ca45ea48530332a4ba09595767bd26d3232743b
- https://git.kernel.org/stable/c/cbe4134ea4bc493239786220bd69cb8a13493190
- https://git.kernel.org/stable/c/e3eed01347721cd7a8819568161c91d538fbf229
- https://git.kernel.org/stable/c/f94c422157f3e43dd31990567b3e5d54b3e5b32b
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html