CVE-2025-38028

Local privilege escalation via NFS use-after-free

Published Jun 18, 2025 · Updated Aug 5, 2026

Use-after-free in Linux kernel 6.14 through 6.14.7 allows local users to corrupt kernel memory via NFS LOCALIO file operations. After clp->cl_uuid.lock is dropped, nfs_local_open_fh can use an nfsd_file freed by another CPU because no RCU read lock preserves its lifetime. A low-privileged local user needs file access on a LOCALIO-enabled NFS mount and can disclose or corrupt file data or trigger a kernel panic.

CVSS severity7.8
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel 6.14 through 6.14.7 allows local users to corrupt kernel memory via NFS LOCALIO file operations. After clp->cl_uuid.lock is dropped, nfs_local_open_fh can use an nfsd_file freed by another CPU because no RCU read lock preserves its lifetime. A low-privileged local user needs file access on a LOCALIO-enabled NFS mount and can disclose or corrupt file data or trigger a kernel panic.

The record

CVE
CVE-2025-38028
Published
Jun 18, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=6.14
  2. Affected versionversion=86e00412254a717ffd5d38dc5ec0ee1cce6281b3 <185a2f2ddabdcf999823f61de67f86376883920d
  3. Affected versionversion=86e00412254a717ffd5d38dc5ec0ee1cce6281b3 <fa7ab64f1e2fdc8f2603aab8e0dd20de89cb10d9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.14; version=86e00412254a717ffd5d38dc5ec0ee1cce6281b3 <185a2f2ddabdcf999823f61de67f86376883920d; version=86e00412254a717ffd5d38dc5ec0ee1cce6281b3 <fa7ab64f1e2fdc8f2603aab8e0dd20de89cb10d9

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux kernel CVE teamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

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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

T1068Exploitation for Privilege Escalation

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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