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CVE-2023-6356

Kernel: null pointer dereference in nvmet_tcp_build_iovec

No known exploitation. EPSS puts it in the 74th percentile. Fixed versions are out.

CVSS 3.16.5MediumEPSS percentile74th1.5% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products5 fixed builds listed below
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OpenVAS · 71 checks

e.g. OID 1.3.6.1.4.1.25623.1.0.127885

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Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Red Hat Enterprise Linux 8Fixed builds0:4.18.0-513.18.1.rt7.320.el8_9, 0:5.14.0-362.24.1.el9_3Stated by: CVE record
  • Red Hat Enterprise Linux 8.6 Extended Update SupportFixed builds0:4.18.0-372.91.1.el8_6Stated by: CVE record
  • Red Hat Enterprise Linux 8.8 Extended Update SupportFixed builds0:4.18.0-477.58.1.el8_8Stated by: CVE record
  • Red Hat Enterprise Linux 9.2 Extended Update SupportFixed builds0:5.14.0-284.52.1.el9_2Stated by: CVE record
  • Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Fixed builds0:4.18.0-372.91.1.el8_6Stated by: CVE record

Versions as the sources state them. 7 more products have version data. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

A flaw was found in the Linux kernel's NVMe driver. This issue may allow an unauthenticated malicious actor to send a set of crafted TCP packages when using NVMe over TCP, leading the NVMe driver to a NULL pointer dereference in the NVMe driver and causing kernel panic and a denial of service.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS74th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

1.5% chance of exploitation activity in the next 30 days, which ranks it in the 74th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

10 events over 1002 days, from the signal feeds we watch.

  1. Patch availableworkaround available, record updated
  2. OpenVAS check added
  3. Patch availableworkaround available, record updated
  4. Publishedweakness classified, att&ck mapped

Affected products

And 17 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Scored 6.5 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality NoneNo confidentiality impact
  • Integrity NoneNo integrity impact
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 36 more references. See all after sign-in

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