CVE-2025-71105

Local denial of service via slab-cache collision

Published Jan 14, 2026 · Updated Jan 14, 2026

Denial of service in the Linux Kernel allows local users to disrupt system availability by mounting multiple crafted F2FS volumes. The f2fs per-superblock inline-xattr cache names can differ while identical object sizes cause the slab allocator to share one cache structure and address. Unmounting one volume and remounting it then collides with the still-referenced cache name and triggers a kernel warning; local mount privileges and two suitable F2FS volumes are required.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux Kernel allows local users to disrupt system availability by mounting multiple crafted F2FS volumes. The f2fs per-superblock inline-xattr cache names can differ while identical object sizes cause the slab allocator to share one cache structure and address. Unmounting one volume and remounting it then collides with the still-referenced cache name and triggers a kernel warning; local mount privileges and two suitable F2FS volumes are required.

The record

CVE
CVE-2025-71105
Published
Jan 14, 2026
Updated
Jan 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 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=5.7
  2. Affected versionversion=a999150f4fe3abbb7efd05411fd5b460be699943 <1eb0b130196bcbc56c5c80c83139fa70c0aa82c5
  3. Affected versionversion=a999150f4fe3abbb7efd05411fd5b460be699943 <1f27ef42bb0b7c0740c5616ec577ec188b8a1d05
  4. Affected versionversion=a999150f4fe3abbb7efd05411fd5b460be699943 <72ce19dfed162da6e430467333b2da70471d08a4
  5. Affected versionversion=a999150f4fe3abbb7efd05411fd5b460be699943 <be4c3a3c6c2304a8fcd14095d18d26f0cc4e222a
  6. Affected versionversion=a999150f4fe3abbb7efd05411fd5b460be699943 <e6d828eae00ec192e18c2ddaa2fd32050a96048a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.7; version=a999150f4fe3abbb7efd05411fd5b460be699943 <1eb0b130196bcbc56c5c80c83139fa70c0aa82c5; version=a999150f4fe3abbb7efd05411fd5b460be699943 <1f27ef42bb0b7c0740c5616ec577ec188b8a1d05; version=a999150f4fe3abbb7efd05411fd5b460be699943 <72ce19dfed162da6e430467333b2da70471d08a4; version=a999150f4fe3abbb7efd05411fd5b460be699943 <be4c3a3c6c2304a8fcd14095d18d26f0cc4e222a; version=a999150f4fe3abbb7efd05411fd5b460be699943 <e6d828eae00ec192e18c2ddaa2fd32050a96048a

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

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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