CVE-2025-71230

Service interruption via leaked HFS mount state

Published Feb 18, 2026 · Updated Feb 18, 2026

Memory leak in Linux Kernel HFS mount handling allows local users to exhaust kernel memory through repeated failed filesystem mounts. If setup_bdev_super() fails after sget_fc() allocates a superblock but before hfs_fill_super() takes ownership, hfs_kill_super() leaves sb->s_fs_info allocated. Reaching the flaw requires local privileges sufficient to initiate HFS mounts; repeated failures can interrupt service by exhausting kernel memory.

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 leak in Linux Kernel HFS mount handling allows local users to exhaust kernel memory through repeated failed filesystem mounts. If setup_bdev_super() fails after sget_fc() allocates a superblock but before hfs_fill_super() takes ownership, hfs_kill_super() leaves sb->s_fs_info allocated. Reaching the flaw requires local privileges sufficient to initiate HFS mounts; repeated failures can interrupt service by exhausting kernel memory.

The record

CVE
CVE-2025-71230
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <399219831514126bc9541e8eadefe02c6fbd9166
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <46c1d56ad321fb024761abd9af61a0cb616cf2f6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <399219831514126bc9541e8eadefe02c6fbd9166; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <46c1d56ad321fb024761abd9af61a0cb616cf2f6

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

T1499.001OS Exhaustion Flood

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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