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

nfsd: check nfsd4_acl_to_attr() return value in nfsd4_create()

nfsd4_create() stores the return value of nfsd4_acl_to_attr() in
status, but the switch(create->cr_type) block unconditionally
overwrites it in every branch. ACL translation errors are silently
discarded, and the CREATE proceeds without the requested ACL.

Add an early exit check after nfsd4_acl_to_attr(), matching the
pattern already used in nfsd4_setattr().

[ cel: prefer NFS4ERR_BADTYPE over NFS4ERR_ATTRNOTSUPP ]

References

• https://nvd.nist.gov/vuln/detail/CVE-2026-89693
• https://git.kernel.org/stable/c/2c7912732184773dbd371a411da87af1cc080b86
• https://git.kernel.org/stable/c/430ed49a16cf9ca249d0fb51490582090bc4848b
• https://git.kernel.org/stable/c/80cebb0e8a8d1e758f0d671f5e047279c5c3e528
• https://git.kernel.org/stable/c/26877d3a09afb3838a053867a655ca30c46a1f81