CVE-2025-71153

Memory exhaustion via failed file-information lookup leak

Published Jan 23, 2026 · Updated Jan 23, 2026

Memory exhaustion in ksmbd in Linux Kernel allows local users to degrade availability through failed file-information lookups. get_file_all_info() allocates a filename, calls vfs_getattr(), and returns on failure without freeing that allocation. Local low-privileged access and repeated execution of the failing path bound the consequence to memory consumption and service interruption; no data access or code execution is reported.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory exhaustion in ksmbd in Linux Kernel allows local users to degrade availability through failed file-information lookups. get_file_all_info() allocates a filename, calls vfs_getattr(), and returns on failure without freeing that allocation. Local low-privileged access and repeated execution of the failing path bound the consequence to memory consumption and service interruption; no data access or code execution is reported.

The record

CVE
CVE-2025-71153
Published
Jan 23, 2026
Updated
Jan 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5614c8c487f6af627614dd2efca038e4afe0c6d7 <0c56693b06a68476ba113db6347e7897475f9e4c
  2. Affected versionversion=5614c8c487f6af627614dd2efca038e4afe0c6d7 <676907004256e0226c7ed3691db9f431404ca258
  3. Affected versionversion=5614c8c487f6af627614dd2efca038e4afe0c6d7 <d026f47db68638521df8543535ef863814fb01b1
  4. Affected versionversion=6.9
  5. Affected versionversion=88779f09295d82b86601fe42595748488bf5e20c
  6. Affected versionversion=c8f7ad2df083c510e640c0bf76166593cc116ff2 <5012b4c812230ae066902a00442708c999111183
  7. Affected versionversion=f9278ba4967027ad2bf001694f0e489c7bbae6d5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5614c8c487f6af627614dd2efca038e4afe0c6d7 <0c56693b06a68476ba113db6347e7897475f9e4c; version=5614c8c487f6af627614dd2efca038e4afe0c6d7 <676907004256e0226c7ed3691db9f431404ca258; version=5614c8c487f6af627614dd2efca038e4afe0c6d7 <d026f47db68638521df8543535ef863814fb01b1; version=6.9; version=88779f09295d82b86601fe42595748488bf5e20c; version=c8f7ad2df083c510e640c0bf76166593cc116ff2 <5012b4c812230ae066902a00442708c999111183; version=f9278ba4967027ad2bf001694f0e489c7bbae6d5

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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