CVE-2026-74316

HighCVSS 7.5

Published: 15/08/2026(UTC)Updated: 17/08/2026(UTC)Translated: 15/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.45%

37th percentile - higher than 37% of all known CVEs

Summary

In the Linux kernel, the NFSD server's nfsd4_drop_revoked_stid() function does not handle the SC_TYPE_LAYOUT case, causing that when a client sends FREE_STATEID for an admin-revoked layout stid, the stid is not removed from the list or freed. The fix removes the layout stid from the list and calls nfs4_put_stid() to drop the reference.

Risk Assessment

Failure to free stid can lead to memory leaks and improper functioning of the NFS server. This may affect service stability and security.

Recommendation

It is recommended to update the Linux kernel to a version containing the fix that properly handles layout stid in nfsd4_drop_revoked_stid().

Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: NFSD: Handle layout stid in nfsd4_drop_revoked_stid() nfsd4_drop_revoked_stid() has no SC_TYPE_LAYOUT case, so when a client sends FREE_STATEID for an admin-revoked layout stid, the default branch releases cl_lock and returns without unhashing or releasing the stid. The stid remains in the IDR and on the per-client list until the client is destroyed. Remove the layout stid from the per-client list and call nfs4_put_stid() to drop the creation reference. When the refcount reaches zero, nfsd4_free_layout_stateid() handles the remaining cleanup: cancelling the fence worker, removing from the per-file list, and freeing the slab object.