VulnerabilityPublished 24 Sep 2026Updated 19 Oct 2026

CVE-2026-93211: Linux kernel · nfsd: initialize DRC hash table before registering shrinker

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in f060f43a67635dbb393bf5dcbfc3e8b9a44942cb : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f060f43a67635dbb393bf5dcbfc3e8b9a44942cb, b57bd8cb739cb3cf88bdb1a5903a42a707a5c282, b0c58934f5cc4f05b63ef6605dd10c1d0d489e88 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to f060f43a67635dbb393bf5dcbfc3e8b9a44942cb, b57bd8cb739cb3cf88bdb1a5903a42a707a5c282, b0c58934f5cc4f05b63ef6605dd10c1d0d489e88 or 431c70ca5163c98c746f22f16cd58ca5aefec6dc.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 8eea99a81c6f67c08fedd7db2ccd09aa93db69a7, < f060f43a67635dbb393bf5dcbfc3e8b9a44942cb	Fixed in f060f43a67635dbb393bf5dcbfc3e8b9a44942cb
LinuxLinux	Affected ≥ 8eea99a81c6f67c08fedd7db2ccd09aa93db69a7, < b57bd8cb739cb3cf88bdb1a5903a42a707a5c282	Fixed in b57bd8cb739cb3cf88bdb1a5903a42a707a5c282
LinuxLinux	Affected ≥ 8eea99a81c6f67c08fedd7db2ccd09aa93db69a7, < b0c58934f5cc4f05b63ef6605dd10c1d0d489e88	Fixed in b0c58934f5cc4f05b63ef6605dd10c1d0d489e88
LinuxLinux	Affected ≥ 8eea99a81c6f67c08fedd7db2ccd09aa93db69a7, < 431c70ca5163c98c746f22f16cd58ca5aefec6dc	Fixed in 431c70ca5163c98c746f22f16cd58ca5aefec6dc
LinuxLinux	Affected =6.7	Fixed in–

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.

References

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