CVE-2026-98359Public exploit

Kernel memory fault via unregistered netdev callback

Published Oct 6, 2026 · Updated Oct 6, 2026

Use-after-free in the Linux RDMA core allows attackers to trigger a kernel memory error during an asynchronous Ethernet port query. The ib_get_eth_speed function invokes a netdev ethtool callback without checking whether the device is still registered, allowing a query to overlap device teardown. Exposure requires an RDMA port query during netdev unregistration; the reported result is a kernel memory-safety fault, not demonstrated code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.12%
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 RDMA core allows attackers to trigger a kernel memory error during an asynchronous Ethernet port query. The ib_get_eth_speed function invokes a netdev ethtool callback without checking whether the device is still registered, allowing a query to overlap device teardown. Exposure requires an RDMA port query during netdev unregistration; the reported result is a kernel memory-safety fault, not demonstrated code execution.

The record

CVE
CVE-2026-98359
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 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=4.14
  2. Affected versionversion=d41861942fc55c14b6280d9568a0d0112037f065 <45c60ffc79771bad154f224a05753191cf1b37bc
  3. Affected versionversion=d41861942fc55c14b6280d9568a0d0112037f065 <520cd057f138ed8dbe8e05f0eae3a8ed4c5d3a5e
  4. Affected versionversion=d41861942fc55c14b6280d9568a0d0112037f065 <5bd42f74ec3b4f4687fb600f367af0828d513b3c
  5. Affected versionversion=d41861942fc55c14b6280d9568a0d0112037f065 <a219459fbd1b2598e63c81a52847eba6c28b72d2
  6. Affected versionversion=d41861942fc55c14b6280d9568a0d0112037f065 <be4b44c8b47c67a04c08b1a0aba18006b749ae6a
  7. Affected versionversion=d41861942fc55c14b6280d9568a0d0112037f065 <ef9fbe1b93f3b617b96e86d5cd76b3fa44514cb5

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=4.14; version=d41861942fc55c14b6280d9568a0d0112037f065 <45c60ffc79771bad154f224a05753191cf1b37bc; version=d41861942fc55c14b6280d9568a0d0112037f065 <520cd057f138ed8dbe8e05f0eae3a8ed4c5d3a5e; version=d41861942fc55c14b6280d9568a0d0112037f065 <5bd42f74ec3b4f4687fb600f367af0828d513b3c; version=d41861942fc55c14b6280d9568a0d0112037f065 <a219459fbd1b2598e63c81a52847eba6c28b72d2; version=d41861942fc55c14b6280d9568a0d0112037f065 <be4b44c8b47c67a04c08b1a0aba18006b749ae6a; version=d41861942fc55c14b6280d9568a0d0112037f065 <ef9fbe1b93f3b617b96e86d5cd76b3fa44514cb5

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 exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

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Technologies

Your stack

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Your stack

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