NFSD: Handle layout stid in nfsd4_drop_revoked_stid() (CVE-2026-74316) | HOL Guard CVE

High · CVSS 7.5CVE-2026-74316

NFSD: Handle layout stid in nfsd4_drop_revoked_stid()

Answer in brief

CVE-2026-74316 records a High severity (CVSS 7.5) vulnerability in NFSD: Handle layout stid in nfsd4_drop_revoked_stid(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 15, 2026Updated Aug 17, 2026Source checked Sep 30, 2026First seen by HOL Aug 15, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=1e33e1414bec54a4feafa9e67e2617031be0afe2 <7ed62f7040ee182cf7dea5798f9e114235b31dae \|\| >=1e33e1414bec54a4feafa9e67e2617031be0afe2 <da6f86ff4f2dd490bea52419a49e19680efd5847 \|\| >=1e33e1414bec54a4feafa9e67e2617031be0afe2 <8024028ef91616cf91cc669f2446a0406bc0ba19 \|\| >=1e33e1414bec54a4feafa9e67e2617031be0afe2 <86b9898920a6d02b4149f4fef9efd77b8aa3b9ca	7ed62f7040ee182cf7dea5798f9e114235b31dae, da6f86ff4f2dd490bea52419a49e19680efd5847, 8024028ef91616cf91cc669f2446a0406bc0ba19, 86b9898920a6d02b4149f4fef9efd77b8aa3b9ca
Linux/Linuxgeneric	6.9	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 7ed62f7040ee182cf7dea5798f9e114235b31dae if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 15, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.