CVE-2026-89668

Status: UPDATED  |  Advisory ID: CVE-2026-89668

Key Details

Affected Products, Subsystems & Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

nfsd: move nfsd_debugfs_init() after nfsd4_init_slabs() in init_nfsd()

nfsd_debugfs_init() runs before nfsd4_init_slabs() in init_nfsd().

If the slab allocation fails, the bare "return retval" bypasses

nfsd_debugfs_exit(), leaving orphan debugfs files with stale fops

pointers into the freed module text.

Move nfsd_debugfs_init() to after the slab init succeeds, so the

early return has no debugfs state to clean up.

Since debugfs is now the more recently initialized of the two, also

update the unwind paths to match reverse-initialization (LIFO) order:

run nfsd_debugfs_exit() before nfsd4_free_slabs() in both the

init_nfsd() error path and exit_nfsd(). The nfsd debugfs files only

reference module-global state and have no dependency on the slab

caches, so that reordering is a cleanup with no functional change. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References