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CVE Record

CVE-2024-46736: smb: client: fix double put of @cfile in smb2_rename_path()

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double put of @cfile in smb2_rename_path() If smb2_set_path_attr() is called with a valid @cfile and returned -EINVAL, we need to call cifs_get_writable_path() again as the reference of @cfile was already dropped by previous smb2_compound_op() call.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2024-46736 is a Linux kernel SMB client bug involving incorrect handling of an internal file reference during a rename path error case. The public record does not provide CVSS, CWE, or a clear impact statement. Treat it as a kernel maintenance issue, with higher attention on systems that mount SMB/CIFS shares.

Executive priority

Schedule remediation through normal kernel patch governance, elevating priority for SMB-dependent servers and workstations. There is no source-backed evidence of active exploitation, but kernel reference-counting flaws can affect reliability and should not be left unmanaged.

Technical view

The Linux SMB/CIFS client could double-release cfile in smb2_rename_path() when smb2_set_path_attr() returned -EINVAL after smb2_compound_op() had already dropped the reference. The fix reacquires a writable path before continuing. Public sources identify the code defect and fixes but do not state exploitability or concrete impact.

Likely exposure

Exposure is most likely on Linux systems running affected kernel versions that use the SMB/CIFS client to mount or operate on SMB shares. Systems not using the kernel SMB client are less likely exposed. The bundle’s affected version data is incomplete and should be verified against vendor kernel packages.

Exploitation context

CISA KEV status is false, and the supplied sources do not report active exploitation or public exploit activity. The bundle does not describe attacker prerequisites, required privileges, or reachable impact, so exploitation likelihood cannot be reliably rated from these sources alone.

Researcher notes

The source bundle supports a narrow conclusion: an SMB client reference handling bug was fixed in Linux stable commits. It does not provide CVSS, CWE, crash details, exploitability analysis, or vendor package mapping. Further assessment should focus on affected kernel branch ranges and distro backports.

Mitigation direction

  • Update affected Linux kernels using distribution or vendor-supported packages.
  • Prioritize hosts that mount SMB/CIFS shares or run file services depending on them.
  • Review kernel stable commits linked in the CVE record for fixed branches.
  • Check Linux distribution advisories for backported fixes and package-specific version mapping.

Validation and detection

  • Inventory Linux hosts using SMB/CIFS mounts or related automation.
  • Compare running kernel package versions with distribution advisory fixed versions.
  • Confirm the relevant stable kernel fix is present in source or package changelog.
  • Monitor logs for SMB/CIFS client instability, while recognizing logs cannot prove exposure.
Prepared
Confidence
medium
Sources
5

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-2024-46736 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
1ADP providers
4Source 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

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux1e60bc0e954389af82f1d9a85f13a63f6572350f, 71f15c90e785d1de4bcd65a279e7256684c25c0d, 71f15c90e785d1de4bcd65a279e7256684c25c0d, 6.6.32unaffected
LinuxLinux6.9, 0, 6.6.51, 6.10.10, 6.11affected
Weakness

CWE details

No CWE listed

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