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CVE Record

CVE-2025-71153: ksmbd: Fix memory leak in get_file_all_info()

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix memory leak in get_file_all_info() In get_file_all_info(), if vfs_getattr() fails, the function returns immediately without freeing the allocated filename, leading to a memory leak. Fix this by freeing the filename before returning in this error case.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue is a memory leak in ksmbd, the in-kernel SMB server. A failed file-attribute lookup can leave an allocated filename in memory. The business risk appears availability-focused, but the source bundle provides no CVSS score, severity rating, or exploitation evidence.

Executive priority

Treat as a routine kernel maintenance item unless ksmbd is internet-exposed or business-critical. Prioritize patch validation on SMB-serving Linux hosts, but do not assume emergency exploitation without stronger evidence.

Technical view

In get_file_all_info(), an error return from vfs_getattr() skipped cleanup of an allocated filename. The stable kernel fixes free that memory before returning. The affected component is Linux ksmbd; exact distribution exposure depends on kernel branch, backports, and whether ksmbd is enabled.

Likely exposure

Linux systems running kernels with ksmbd available and enabled are the relevant exposure group. Systems not using ksmbd are unlikely to reach this code path. Distribution kernels require vendor-specific mapping because backports may change version conclusions.

Exploitation context

The provided sources do not show active exploitation, KEV listing, public exploit code, or weaponized details. Based on the description, impact is most plausibly resource leakage and availability degradation if an attacker can repeatedly trigger the error path.

Researcher notes

Evidence is limited to the CVE description and kernel stable commit references. There is no CVSS, CWE, or exploitability analysis in the bundle. Focus review on ksmbd deployments and whether vfs_getattr() failure can be induced remotely in affected builds.

Mitigation direction

  • Check Linux distribution advisories for CVE-2025-71153 mapping.
  • Update to a kernel containing the referenced stable fixes.
  • Disable ksmbd if SMB serving is not required.
  • Restrict SMB exposure to trusted networks where operationally possible.

Validation and detection

  • Inventory Linux hosts and kernel versions.
  • Confirm whether the ksmbd module or service is enabled.
  • Map installed kernels against vendor advisories and backports.
  • Review change logs for the referenced stable commits.
Prepared
Confidence
medium
Sources
6

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-2025-71153 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
0ADP providers
5Source links

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.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxc8f7ad2df083c510e640c0bf76166593cc116ff2, 5614c8c487f6af627614dd2efca038e4afe0c6d7, 5614c8c487f6af627614dd2efca038e4afe0c6d7, 5614c8c487f6af627614dd2efca038e4afe0c6d7, f9278ba4967027ad2bf001694f0e489c7bbae6d5, 88779f09295d82b86601fe42595748488bf5e20c, 6.6.24, 6.7.12, 6.8.3unaffected
LinuxLinux6.9, 0, 6.6.120, 6.12.64, 6.18.4, 6.19affected
Weakness

CWE details

No CWE listed

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