CVE-2026-93278

Kernel crash via active NAPI use-after-free

Published Sep 24, 2026 · Updated Sep 24, 2026

Use-after-free in the Linux Octeon Ethernet driver in 2.6.34 and affected later revisions allows attackers to crash the kernel during removal. cvm_oct_rx_shutdown frees interrupts and deletes NAPI state without first disabling polling, allowing an active poll to access the freed platform structure. The race requires an Octeon device, active receive polling, and concurrent driver removal; public material does not establish an attacker-controlled trigger.

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

What happened

Use-after-free in the Linux Octeon Ethernet driver in 2.6.34 and affected later revisions allows attackers to crash the kernel during removal. cvm_oct_rx_shutdown frees interrupts and deletes NAPI state without first disabling polling, allowing an active poll to access the freed platform structure. The race requires an Octeon device, active receive polling, and concurrent driver removal; public material does not establish an attacker-controlled trigger.

The record

CVE
CVE-2026-93278
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=2.6.34
  2. Affected versionversion=3368c784bcf77124aaf39372e627016c36bd4472 <158389d7af04bbf0664d91c2ce31fcc9eeace1eb
  3. Affected versionversion=3368c784bcf77124aaf39372e627016c36bd4472 <89f9f433271fad9351de6a3c713b45b2cfb23e4a
  4. Affected versionversion=3368c784bcf77124aaf39372e627016c36bd4472 <98f9036b2254c928cb44da0c77dba38f66f7d8f1
  5. Affected versionversion=3368c784bcf77124aaf39372e627016c36bd4472 <b2243ffaac14cc3639b5b32a371aac37f96ee554
  6. Affected versionversion=3368c784bcf77124aaf39372e627016c36bd4472 <b38fbd68cc36b4f478a1e3cfc169b8616ae1337d
  7. Affected versionversion=3368c784bcf77124aaf39372e627016c36bd4472 <c0a9a8586a63fda49e61a6b83360feac2a60d898
  8. Affected versionversion=3368c784bcf77124aaf39372e627016c36bd4472 <c124049c3a7006fd6caf629139a5722610bbffb4

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.34; version=3368c784bcf77124aaf39372e627016c36bd4472 <158389d7af04bbf0664d91c2ce31fcc9eeace1eb; version=3368c784bcf77124aaf39372e627016c36bd4472 <89f9f433271fad9351de6a3c713b45b2cfb23e4a; version=3368c784bcf77124aaf39372e627016c36bd4472 <98f9036b2254c928cb44da0c77dba38f66f7d8f1; version=3368c784bcf77124aaf39372e627016c36bd4472 <b2243ffaac14cc3639b5b32a371aac37f96ee554; version=3368c784bcf77124aaf39372e627016c36bd4472 <b38fbd68cc36b4f478a1e3cfc169b8616ae1337d; version=3368c784bcf77124aaf39372e627016c36bd4472 <c0a9a8586a63fda49e61a6b83360feac2a60d898; version=3368c784bcf77124aaf39372e627016c36bd4472 <c124049c3a7006fd6caf629139a5722610bbffb4

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.

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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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