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CVE Record

CVE-2024-39468: smb: client: fix deadlock in smb2_find_smb_tcon()

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix deadlock in smb2_find_smb_tcon() Unlock cifs_tcp_ses_lock before calling cifs_put_smb_ses() to avoid such deadlock.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel SMB client deadlock issue. Affected systems can hang in the SMB client path when the kernel mishandles locking while looking up an SMB tree connection. The public record does not provide CVSS, CWE, exploit evidence, or a named attacker path.

Executive priority

Moderate operational priority where Linux systems depend on SMB file access or affected Siemens products are present. Business urgency is lower without exploitation evidence or severity scoring, but kernel deadlocks can affect service availability and should enter normal patch governance.

Technical view

The resolved bug is in smb2_find_smb_tcon(). The fix releases cifs_tcp_ses_lock before calling cifs_put_smb_ses(), avoiding a deadlock in the Linux CIFS/SMB client code. Kernel stable commits are referenced, but the source bundle provides limited version-range detail.

Likely exposure

Exposure is most relevant to Linux systems using the kernel CIFS/SMB client to access SMB shares. Siemens advisories are referenced, indicating downstream product tracking, but affected Siemens product details are not included in the provided bundle.

Exploitation context

The CVE is not listed as KEV in the provided bundle. No cited source states active exploitation, public exploit availability, or remote unauthenticated exploitability. Treat this as an availability-risk kernel bug until vendor advisories provide more detail.

Researcher notes

The public record is sparse: no CVSS, CWE, exploit status, or detailed trigger conditions are provided. Analysis should focus on the SMB client locking change and vendor-specific affected-version mapping rather than assuming broader impact.

Mitigation direction

  • Check vendor kernel packages for CVE-2024-39468 fixes.
  • Prioritize Linux hosts that mount or access SMB shares.
  • Review Siemens advisories if using affected Siemens products.
  • Apply kernel stable updates containing the referenced fixes.
  • Follow distribution guidance for reboot or live-patch requirements.

Validation and detection

  • Inventory Linux kernel versions on SMB client systems.
  • Identify hosts using CIFS or SMB mounts.
  • Compare installed kernels against vendor-fixed releases.
  • Confirm the relevant stable fix is present in kernel changelogs.
  • Review Siemens advisory applicability for deployed products.
Prepared
Confidence
medium
Sources
11

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2024-39468 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
3ADP providers
10Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux78ebec450ef4f0720c592638d92bad679d75d7ce, e695a9ad0305af6e8b0cbc24a54976ac2120cbb3, e695a9ad0305af6e8b0cbc24a54976ac2120cbb3, e695a9ad0305af6e8b0cbc24a54976ac2120cbb3, e695a9ad0305af6e8b0cbc24a54976ac2120cbb3, e695a9ad0305af6e8b0cbc24a54976ac2120cbb3unaffected
LinuxLinux5.14, 0, 5.15.162, 6.1.94, 6.6.34, 6.9.5, 6.10affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.