CVE-2026-23054

Local hang via absent RSS indirection table

Published Feb 4, 2026 · Updated Feb 4, 2026

Denial of service in the Linux Kernel hv_netvsc driver allows local users to cause a hang by programming an RSS hash key. When a single-queue Hyper-V device causes rndis_filter_device_add() to omit the RX indirection table, netvsc_set_rxfh() still processes the unsupported update. Reaching the path requires local network-administration privileges, and the published consequence is limited to a hang.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux Kernel hv_netvsc driver allows local users to cause a hang by programming an RSS hash key. When a single-queue Hyper-V device causes rndis_filter_device_add() to omit the RX indirection table, netvsc_set_rxfh() still processes the unsupported update. Reaching the path requires local network-administration privileges, and the published consequence is limited to a hang.

The record

CVE
CVE-2026-23054
Published
Feb 4, 2026
Updated
Feb 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Feb 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 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=4.11
  2. Affected versionversion=962f3fee83a4ef9010ae84dc43ae7aecb572e2a9 <11dd9a9ef4dc4507a15a69b8511a0013c6c28fa3
  3. Affected versionversion=962f3fee83a4ef9010ae84dc43ae7aecb572e2a9 <4cd55c609e85ae2313248ef1a33619a3eef44a16
  4. Affected versionversion=962f3fee83a4ef9010ae84dc43ae7aecb572e2a9 <82c9039c8ebb715753a40434df714f865a3aec9c
  5. Affected versionversion=962f3fee83a4ef9010ae84dc43ae7aecb572e2a9 <d23564955811da493f34412d7de60fa268c8cb50

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.11; version=962f3fee83a4ef9010ae84dc43ae7aecb572e2a9 <11dd9a9ef4dc4507a15a69b8511a0013c6c28fa3; version=962f3fee83a4ef9010ae84dc43ae7aecb572e2a9 <4cd55c609e85ae2313248ef1a33619a3eef44a16; version=962f3fee83a4ef9010ae84dc43ae7aecb572e2a9 <82c9039c8ebb715753a40434df714f865a3aec9c; version=962f3fee83a4ef9010ae84dc43ae7aecb572e2a9 <d23564955811da493f34412d7de60fa268c8cb50

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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