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Vulnerabilities/CVE-2023-6606Public Intelligence Dossier
Source: linux · Limited verification•Last verified: •Collection Degraded
CVE-2023-6606Unknown / EvaluatingHIGH (raw)CVSS 7.1CWE-125

An out-of-bounds read vulnerability was found in smbCalcSize in fs/smb/client/netmisc.c in the Linux Kernel

Published: 08 Dec 2023•Last updated: 15 Oct 2026, 04:47 AM IST•Source identifier: secalert@redhat.com
Dossier completeness: source-provided sections 2 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
7.1HIGH (raw)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Metric sourcesecalert@redhat.com
EPSS probability
0.5%0.005
Percentile43rd
Weakness type
CWE-125
No further CWE recorded
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

An out-of-bounds read vulnerability was found in smbCalcSize in fs/smb/client/netmisc.c in the Linux Kernel. This issue could allow a local attacker to crash the system or leak internal kernel information.

SOC priority

High

Actively exploited

Unknown

Publicly disclosed

Unknown

Risk basis: SOC ecosystem technology relevance; HIGH severity; No confirmed exploitation signal in current enrichment

Affected Products & Remediation

5 source-backed products
Affected products and versions (source)
  • linux linux kernel · >= 6.4.1 < 6.7; 6.4; 6.7 · NVD CPE · Source
  • redhat enterprise linux · 8.0; 9.0; eus 9.2; eus 9.4; server aus 9.2; server aus 9.4; server for power little endian update services for sap solutions 9.2; server for power little endian update services for sap solutions 9.2 ppc64le · NVD CPE · Source
  • redhat enterprise linux eus · 9.2; 9.4 · NVD CPE · Source
  • redhat enterprise linux server aus · 9.2; 9.4 · NVD CPE · Source
  • redhat enterprise linux server for power little endian update services for sap solutions · 9.2; 9.2 ppc64le · NVD CPE · Source
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

Not provided by source

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
Unknown
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched local-privilege-escalation (CVSS AV:L, CVSS PR:L)

Exposure

  1. Identify hosts reporting this CVE, prioritising shared or multi-user systems.Telemetry: DeviceTvmSoftwareVulnerabilities · A local, low-privilege vector matters most where untrusted users can run code. · Rule local-privilege-escalation

Exploitation evidence

  1. Look for low-privileged processes spawning SYSTEM or root-level child processes on affected hosts.Telemetry: DeviceProcessEvents · Hunting hypothesis from the CVSS vector; privilege transitions are a focused starting point, not evidence of attack. · Rule local-privilege-escalation

Response

  1. Confirm the source-stated update on affected hosts.Telemetry: DeviceTvmSoftwareVulnerabilities · Host inventory can verify remediation. · Rule local-privilege-escalation

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
secalert@redhat.com
Record status · verification
UPDATED · NVD API
CPE
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*, cpe:2.3:o:linux:linux_kernel:6.4:-:*:*:*:*:*:*, cpe:2.3:o:linux:linux_kernel:6.4:rc4:*:*:*:*:*:*, cpe:2.3:o:linux:linux_kernel:6.4:rc5:*:*:*:*:*:*, cpe:2.3:o:linux:linux_kernel:6.4:rc6:*:*:*:*:*:*, cpe:2.3:o:linux:linux_kernel:6.4:rc7:*:*:*:*:*:*, cpe:2.3:o:linux:linux_kernel:6.7:rc1:*:*:*:*:*:*, cpe:2.3:o:linux:linux_kernel:6.7:rc2:*:*:*:*:*:*, cpe:2.3:o:linux:linux_kernel:6.7:rc3:*:*:*:*:*:*, cpe:2.3:o:linux:linux_kernel:6.7:rc4:*:*:*:*:*:*

Evidence & Provenance

3 public sources
nvd.nist.govSource recordaccess.redhat.comSource recordaccess.redhat.comSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2023-6606
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2023-6606
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2023-6606"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

Correlated briefings

— No published briefing references this CVE

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.