CVE-2026-68417

Local kernel compromise via premature QP publication

Published Aug 10, 2026 · Updated Aug 10, 2026

Race condition in the Linux RDMA/siw component allows local users to crash the kernel or compromise kernel memory through QP creation. siw_create_qp() inserts a queue pair into the QPN lookup table before initializing its queues, completion queues, state, completion object, and device-list entry. Exploitation requires local access to the siw RDMA character devices and concurrent QP creation and lookup; systems not using siw RDMA are unaffected.

CVSS severity7.8
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux RDMA/siw component allows local users to crash the kernel or compromise kernel memory through QP creation. siw_create_qp() inserts a queue pair into the QPN lookup table before initializing its queues, completion queues, state, completion object, and device-list entry. Exploitation requires local access to the siw RDMA character devices and concurrent QP creation and lookup; systems not using siw RDMA are unaffected.

The record

CVE
CVE-2026-68417
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=5.3
  2. Affected versionversion=f29dd55b0236f7a26a4b9dd69186e3c04266797b <36e91a58397ca8c978e38a0bf389f0c6113fa8ca
  3. Affected versionversion=f29dd55b0236f7a26a4b9dd69186e3c04266797b <52f9fcb191143448df55fd215ff09c5207fed43e
  4. Affected versionversion=f29dd55b0236f7a26a4b9dd69186e3c04266797b <74912ad168f87d6b2b670a87987bb302d6e64aa1
  5. Affected versionversion=f29dd55b0236f7a26a4b9dd69186e3c04266797b <bb27fcc67c429d97f785c92c35a6c5adebb05d7f
  6. Affected versionversion=f29dd55b0236f7a26a4b9dd69186e3c04266797b <fcc9d50022bcdb1f9f7ed04955c72b4a7355af3d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.3; version=f29dd55b0236f7a26a4b9dd69186e3c04266797b <36e91a58397ca8c978e38a0bf389f0c6113fa8ca; version=f29dd55b0236f7a26a4b9dd69186e3c04266797b <52f9fcb191143448df55fd215ff09c5207fed43e; version=f29dd55b0236f7a26a4b9dd69186e3c04266797b <74912ad168f87d6b2b670a87987bb302d6e64aa1; version=f29dd55b0236f7a26a4b9dd69186e3c04266797b <bb27fcc67c429d97f785c92c35a6c5adebb05d7f; version=f29dd55b0236f7a26a4b9dd69186e3c04266797b <fcc9d50022bcdb1f9f7ed04955c72b4a7355af3d

Published CVSS scores

7.8Linux kernel CVE teamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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