CVE-2026-46135Network attack vector

Remote kernel memory corruption via queue teardown race

Published May 28, 2026 · Updated May 28, 2026

Race condition in Linux Kernel allows remote attackers to trigger duplicate NVMe/TCP queue release by opening and immediately closing a connection. nvmet_tcp_handle_icreq() overwrites DISCONNECTING with LIVE or FAILED after teardown, bypassing the release guard and issuing a second kref_put() on a released queue. Exploitation requires a reachable NVMe/TCP target and precise ICReq/disconnect timing; the duplicate reference drop can corrupt kernel memory and interrupt the host.

CVSS severity9.8
Critical
EPSS probability0.40%
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 allows remote attackers to trigger duplicate NVMe/TCP queue release by opening and immediately closing a connection. nvmet_tcp_handle_icreq() overwrites DISCONNECTING with LIVE or FAILED after teardown, bypassing the release guard and issuing a second kref_put() on a released queue. Exploitation requires a reachable NVMe/TCP target and precise ICReq/disconnect timing; the duplicate reference drop can corrupt kernel memory and interrupt the host.

The record

CVE
CVE-2026-46135
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-362, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <6.12.88
  2. Affected versionversion=0 <6.18.30
  3. Affected versionversion=0 <7.0.7
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <49891c8fe0cb43fbbe480da1cdccfbbaeb820cb3
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5293a8882c549fab4a878bc76b0b6c951f980a61
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <67e1aaf93b495c2f10bc8a5fbba575fbb7f449b6
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dcfe4d1f7960e7d1c01642318f3aae1a604f8508

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <6.12.88; version=0 <6.18.30; version=0 <7.0.7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <49891c8fe0cb43fbbe480da1cdccfbbaeb820cb3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5293a8882c549fab4a878bc76b0b6c951f980a61; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <67e1aaf93b495c2f10bc8a5fbba575fbb7f449b6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dcfe4d1f7960e7d1c01642318f3aae1a604f8508

Published CVSS scores

9.8kernel.orgCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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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