CVE-2026-74316
Last modified
CVE-2026-74316 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 1e33e1414bec54a4feafa9e67e2617031be0afe2, < 7ed62f7040ee182cf7dea5798f9e114235b31dae; >= 1e33e1414bec54a4feafa9e67e2617031be0afe2, < da6f86ff4f2dd490bea52419a49e19680efd5847; >= 1e33e1414bec54a4feafa9e67e2617031be0afe2, < 8024028ef91616cf91cc669f2446a0406bc0ba19; >= 1e33e1414bec54a4feafa9e67e2617031be0afe2, < 86b9898920a6d02b4149f4fef9efd77b8aa3b9ca |
| Linux | Linux | 6.9 |
References
Timeline
- Published
- Last Modified
- Status
- Received
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