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

NFSD: fix leaked reference count of nfsd4_ssc_umount_item

The reference count of nfsd4_ssc_umount_item is not decremented
on error conditions. This prevents the laundromat from unmounting
the vfsmount of the source file.

This patch decrements the reference count of nfsd4_ssc_umount_item
on error.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-53381
• https://git.kernel.org/stable/c/2da50149981d05955e51c28e982e9ac29bd73417
• https://git.kernel.org/stable/c/34e8f9ec4c9ac235f917747b23a200a5e0ec857b
• https://git.kernel.org/stable/c/6c3c05402547aaca3edb23327b50f01a881831b9
• https://git.kernel.org/stable/c/80a15dc4a0214b55ca42675bb0bb2a8d857eb1d0
• https://git.kernel.org/stable/c/9f0df37520a27ad99eaacf38418b3d2bb5023105