CVE-2025-68803Network attack vector

Unauthorized NFS access via omitted named ACL

Published Jan 13, 2026 · Updated Jan 13, 2026

Access-control failure in Linux Kernel allows remote authenticated users to read or alter NFS data through an omitted named ACL. nfsd_attrs_valid() ignores POSIX ACL-only changes, causing nfsd_create_setattr() to skip nfsd_setattr() and leave only mode-based permissions. Exploitation requires ordinary access to an exported filesystem and another client or user to create an object with a named ACL.

CVSS severity8.0
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access-control failure in Linux Kernel allows remote authenticated users to read or alter NFS data through an omitted named ACL. nfsd_attrs_valid() ignores POSIX ACL-only changes, causing nfsd_create_setattr() to skip nfsd_setattr() and leave only mode-based permissions. Exploitation requires ordinary access to an exported filesystem and another client or user to create an object with a named ACL.

The record

CVE
CVE-2025-68803
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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=6.0
  2. Affected versionversion=c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b <214b396480061cbc8b16f2c518b2add7fbfa5192
  3. Affected versionversion=c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b <60dbdef2ebc2317266a385e4debdb1bb0e57afe1
  4. Affected versionversion=c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b <913f7cf77bf14c13cfea70e89bcb6d0b22239562
  5. Affected versionversion=c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b <bf4e671c651534a307ab2fabba4926116beef8c3
  6. Affected versionversion=c5409ce523af40d5c3019717bc5b4f72038d48be
  7. Affected versionversion=d52acd23a327cada5fb597591267cfc09f08bb1d

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.0; version=c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b <214b396480061cbc8b16f2c518b2add7fbfa5192; version=c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b <60dbdef2ebc2317266a385e4debdb1bb0e57afe1; version=c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b <913f7cf77bf14c13cfea70e89bcb6d0b22239562; version=c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b <bf4e671c651534a307ab2fabba4926116beef8c3; version=c5409ce523af40d5c3019717bc5b4f72038d48be; version=d52acd23a327cada5fb597591267cfc09f08bb1d

Published CVSS scores

8.0kernel.orgCVSS:3.1/AV:N/AC:L/PR:L/UI:R/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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