CVE-2026-68418

Local system crash via zero RDMA buffer count

Published Aug 10, 2026 · Updated Aug 10, 2026

NULL pointer dereference in affected Linux kernel releases starting at 5.14 allows local users to crash the system during irdma QP creation. The user QP path skips populating iwqp->iwpbl when req.user_wqe_bufs is zero, but irdma_setup_virt_qp later dereferences that pointer. Exploitation requires low-privileged local access to a system using the affected irdma RDMA path, and the bounded consequence is a system crash.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in affected Linux kernel releases starting at 5.14 allows local users to crash the system during irdma QP creation. The user QP path skips populating iwqp->iwpbl when req.user_wqe_bufs is zero, but irdma_setup_virt_qp later dereferences that pointer. Exploitation requires low-privileged local access to a system using the affected irdma RDMA path, and the bounded consequence is a system crash.

The record

CVE
CVE-2026-68418
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
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=5.14
  2. Affected versionversion=b48c24c2d710cf34810c555dcef883a3d35a9c08 <728211c815f6eef28dd3df2a5b6297483185aa20
  3. Affected versionversion=b48c24c2d710cf34810c555dcef883a3d35a9c08 <b9b0889071569d43623c260074e159cd8f26adb1
  4. Affected versionversion=b48c24c2d710cf34810c555dcef883a3d35a9c08 <ec675b4cdfd378d8c9dd8c93126c024f2469bd79

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=b48c24c2d710cf34810c555dcef883a3d35a9c08 <728211c815f6eef28dd3df2a5b6297483185aa20; version=b48c24c2d710cf34810c555dcef883a3d35a9c08 <b9b0889071569d43623c260074e159cd8f26adb1; version=b48c24c2d710cf34810c555dcef883a3d35a9c08 <ec675b4cdfd378d8c9dd8c93126c024f2469bd79

Published CVSS scores

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

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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