CVE-2026-93211

Kernel crash via partially initialized DRC table

Published Sep 24, 2026 · Updated Sep 24, 2026

A race in nfsd DRC initialization in affected Linux revisions allows attackers to crash the kernel during a concurrent shrinker scan. The setup path registers its shrinker before initializing DRC bucket list heads and publishing drc_hashsize, exposing a partially initialized table. On weakly ordered arm64 and powerpc systems, a shrinker scan can observe the size first and dereference a NULL list head, producing a kernel crash.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race in nfsd DRC initialization in affected Linux revisions allows attackers to crash the kernel during a concurrent shrinker scan. The setup path registers its shrinker before initializing DRC bucket list heads and publishing drc_hashsize, exposing a partially initialized table. On weakly ordered arm64 and powerpc systems, a shrinker scan can observe the size first and dereference a NULL list head, producing a kernel crash.

The record

CVE
CVE-2026-93211
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.7
  2. Affected versionversion=8eea99a81c6f67c08fedd7db2ccd09aa93db69a7 <431c70ca5163c98c746f22f16cd58ca5aefec6dc
  3. Affected versionversion=8eea99a81c6f67c08fedd7db2ccd09aa93db69a7 <b0c58934f5cc4f05b63ef6605dd10c1d0d489e88
  4. Affected versionversion=8eea99a81c6f67c08fedd7db2ccd09aa93db69a7 <b57bd8cb739cb3cf88bdb1a5903a42a707a5c282
  5. Affected versionversion=8eea99a81c6f67c08fedd7db2ccd09aa93db69a7 <f060f43a67635dbb393bf5dcbfc3e8b9a44942cb

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=8eea99a81c6f67c08fedd7db2ccd09aa93db69a7 <431c70ca5163c98c746f22f16cd58ca5aefec6dc; version=8eea99a81c6f67c08fedd7db2ccd09aa93db69a7 <b0c58934f5cc4f05b63ef6605dd10c1d0d489e88; version=8eea99a81c6f67c08fedd7db2ccd09aa93db69a7 <b57bd8cb739cb3cf88bdb1a5903a42a707a5c282; version=8eea99a81c6f67c08fedd7db2ccd09aa93db69a7 <f060f43a67635dbb393bf5dcbfc3e8b9a44942cb

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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