CVE-2026-45898Network attack vector

Kernel crash via queued RDMA work reuse

Published May 27, 2026 · Updated May 27, 2026

Race condition in Linux Kernel RDMA/iwcm allows remote attackers to crash the kernel through iWARP connection activity. The work handler returns an embedded iwcm_work item to its free list while its unique workqueue entry remains queued, allowing INIT_WORK reuse to corrupt workqueue lists. The affected path requires the RDMA iwcm subsystem and iWARP connection activity; the observed failure is a kernel BUG and service interruption.

CVSS severity9.8
Critical
EPSS probability0.46%
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 Linux Kernel RDMA/iwcm allows remote attackers to crash the kernel through iWARP connection activity. The work handler returns an embedded iwcm_work item to its free list while its unique workqueue entry remains queued, allowing INIT_WORK reuse to corrupt workqueue lists. The affected path requires the RDMA iwcm subsystem and iWARP connection activity; the observed failure is a kernel BUG and service interruption.

The record

CVE
CVE-2026-45898
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=6.11
  2. Affected versionversion=e1168f09b3314992f1c5251f3793102035da7237 <38c5b49fffa1b760959af74f11806eeb3ef4706d
  3. Affected versionversion=e1168f09b3314992f1c5251f3793102035da7237 <7874eeacfa42177565c01d5198726671acf7adf2
  4. Affected versionversion=e1168f09b3314992f1c5251f3793102035da7237 <a6b9e793e74e372daa266fd0d58b751305877897
  5. Affected versionversion=e1168f09b3314992f1c5251f3793102035da7237 <eb715133e0ae12514bba4d2d5ce1dee774476056

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.11; version=e1168f09b3314992f1c5251f3793102035da7237 <38c5b49fffa1b760959af74f11806eeb3ef4706d; version=e1168f09b3314992f1c5251f3793102035da7237 <7874eeacfa42177565c01d5198726671acf7adf2; version=e1168f09b3314992f1c5251f3793102035da7237 <a6b9e793e74e372daa266fd0d58b751305877897; version=e1168f09b3314992f1c5251f3793102035da7237 <eb715133e0ae12514bba4d2d5ce1dee774476056

Published CVSS scores

9.8Linux Kernel CVE TeamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
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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