CVE-2025-38411Network attack vector

Kernel code execution via netfs request double release

Published Jul 25, 2025 · Updated Aug 5, 2026

Double free in the netfs request collector in Linux 6.15.3 through 6.15.5 allows remote attackers to corrupt kernel memory. When a request finishes during the pause loop, netfs_collect_in_app() enters the final wait path and drops the IN_PROGRESS reference a second time after cleanup. The trigger requires a mounted netfs-backed share and a malicious or on-path file server; consequences include kernel code execution or a crash.

CVSS severity9.8
Critical
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in the netfs request collector in Linux 6.15.3 through 6.15.5 allows remote attackers to corrupt kernel memory. When a request finishes during the pause loop, netfs_collect_in_app() enters the final wait path and drops the IN_PROGRESS reference a second time after cleanup. The trigger requires a mounted netfs-backed share and a malicious or on-path file server; consequences include kernel code execution or a crash.

The record

CVE
CVE-2025-38411
Published
Jul 25, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415, CWE-911, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=2b1424cd131cfaba4cf7040473133d26cddac088 <9df7b5ebead649b00bf9a53a798e4bf83a1318fd
  2. Affected versionversion=329ba1cb402ac328224965b8fc7a554a5150908e <d18facba5a5795ad44b2a00a052e3db2fa77ab12
  3. Affected versionversion=6.15.3 <6.15.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2b1424cd131cfaba4cf7040473133d26cddac088 <9df7b5ebead649b00bf9a53a798e4bf83a1318fd; version=329ba1cb402ac328224965b8fc7a554a5150908e <d18facba5a5795ad44b2a00a052e3db2fa77ab12; version=6.15.3 <6.15.6

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8Linux Kernel CVE TeamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.0Red HatCVSS:3.1/AV:L/AC:H/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.

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-415Double Free
CWE-911Improper Update of Reference Count
T1203Exploitation for Client Execution

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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