CVE-2026-23112Network attack vector

Remote kernel crash via unchecked PDU bounds

Published Feb 13, 2026 · Updated Feb 13, 2026

Out-of-bounds access in the NVMe/TCP target in affected Linux Kernel releases allows remote attackers to crash exposed hosts via crafted PDUs. The nvmet_tcp_build_pdu_iovec function can advance past cmd->req.sg when a PDU length or offset exceeds sg_cnt, then build an iterator from invalid scatterlist length and offset values. Reachability requires nvmet-tcp to be loaded and exposed; the demonstrated consequence is a kernel fault and service interruption.

CVSS severity9.8
Critical
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in the NVMe/TCP target in affected Linux Kernel releases allows remote attackers to crash exposed hosts via crafted PDUs. The nvmet_tcp_build_pdu_iovec function can advance past cmd->req.sg when a PDU length or offset exceeds sg_cnt, then build an iterator from invalid scatterlist length and offset values. Reachability requires nvmet-tcp to be loaded and exposed; the demonstrated consequence is a kernel fault and service interruption.

The record

CVE
CVE-2026-23112
Published
Feb 13, 2026
Updated
Feb 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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=5.0
  2. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <043b4307a99f902697349128fde93b2ddde4686c
  3. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <1385be357e8acd09b36e026567f3a9d5c61139de
  4. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <19672ae68d52ff75347ebe2420dde1b07adca09f
  5. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <42afe8ed8ad2de9c19457156244ef3e1eca94b5d
  6. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <52a0a98549344ca20ad81a4176d68d28e3c05a5c
  7. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <ab200d71553bdcf4de554a5985b05b2dd606bc57
  8. Affected versionversion=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <dca1a6ba0da9f472ef040525fab10fd9956db59f

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.0; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <043b4307a99f902697349128fde93b2ddde4686c; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <1385be357e8acd09b36e026567f3a9d5c61139de; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <19672ae68d52ff75347ebe2420dde1b07adca09f; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <42afe8ed8ad2de9c19457156244ef3e1eca94b5d; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <52a0a98549344ca20ad81a4176d68d28e3c05a5c; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <ab200d71553bdcf4de554a5985b05b2dd606bc57; version=872d26a391da92ed8f0c0f5cb5fef428067b7f30 <dca1a6ba0da9f472ef040525fab10fd9956db59f

Published CVSS scores

9.8kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CanonicalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NISTCVSS: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-787Out-of-bounds Write
T1499.004Application or System Exploitation

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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