nfsd: initialize DRC hash table before registering shrinker (CVE-2026-93211) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-93211

nfsd: initialize DRC hash table before registering shrinker

Answer in brief

CVE-2026-93211 records a Unknown severity vulnerability in nfsd: initialize DRC hash table before registering shrinker. 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 Sep 24, 2026Updated Sep 24, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 24, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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	>=8eea99a81c6f67c08fedd7db2ccd09aa93db69a7 <f060f43a67635dbb393bf5dcbfc3e8b9a44942cb \|\| >=8eea99a81c6f67c08fedd7db2ccd09aa93db69a7 <b57bd8cb739cb3cf88bdb1a5903a42a707a5c282 \|\| >=8eea99a81c6f67c08fedd7db2ccd09aa93db69a7 <431c70ca5163c98c746f22f16cd58ca5aefec6dc \|\| >=8eea99a81c6f67c08fedd7db2ccd09aa93db69a7 <b0c58934f5cc4f05b63ef6605dd10c1d0d489e88	f060f43a67635dbb393bf5dcbfc3e8b9a44942cb, b57bd8cb739cb3cf88bdb1a5903a42a707a5c282, 431c70ca5163c98c746f22f16cd58ca5aefec6dc, b0c58934f5cc4f05b63ef6605dd10c1d0d489e88
Linux/Linuxgeneric	6.7	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to f060f43a67635dbb393bf5dcbfc3e8b9a44942cb if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: nfsd: initialize DRC hash table before registering shrinker shrinker_register() precedes the INIT_LIST_HEAD loop and the drc_hashsize store. On weakly-ordered architectures (arm64, ppc), a shrinker scan can observe drc_hashsize before the bucket list heads are initialized, causing a NULL deref in the DRC shrinker callback. Move bucket initialization and the drc_hashsize store before shrinker_register() so the hash table is fully initialized before it becomes visible to the shrinker.

Quoted source text, attributed separately from HOL analysis.