CVE-2026-74316
Description
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.
How to fix
- Linux Linux7ed62f7040ee182cf7dea5798f9e114235b31dae, da6f86ff4f2dd490bea52419a49e19680efd5847, 8024028ef91616cf91cc669f2446a0406bc0ba19, 86b9898920a6d02b4149f4fef9efd77b8aa3b9ca or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 1e33e1414bec54a4feafa9e67e2617031be0afe2 ≤ v < 7ed62f7040ee182cf7dea5798f9e114235b31dae, 1e33e1414bec54a4feafa9e67e2617031be0afe2 ≤ v < da6f86ff4f2dd490bea52419a49e19680efd5847, 1e33e1414bec54a4feafa9e67e2617031be0afe2 ≤ v < 8024028ef91616cf91cc669f2446a0406bc0ba19, 1e33e1414bec54a4feafa9e67e2617031be0afe2 ≤ v < 86b9898920a6d02b4149f4fef9efd77b8aa3b9ca, 6.9 | 7ed62f7040ee182cf7dea5798f9e114235b31dae, da6f86ff4f2dd490bea52419a49e19680efd5847, 8024028ef91616cf91cc669f2446a0406bc0ba19, 86b9898920a6d02b4149f4fef9efd77b8aa3b9ca |
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