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NVD / CVE Program· CNA Linux

CVE-2025-68803: NFSD: NFSv4 file creation neglects setting ACL

Noroxi assessment

Priority: Monitor (action score 32/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.44% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 214b396480061cbc8b16f2c518b2add7fbfa5192, 381261f24f4e4b41521c0e5ef5cc0b9a786a9862, 5.10.248; azl3 kernel 6.6.119.3-3 on Azure Linux 3.0 6.6.121.1-1.

Low priority for now. Upgrade to Linux Linux 214b396480061cbc8b16f2c518b2add7fbfa5192, 381261f24f4e4b41521c0e5ef5cc0b9a786a9862, 5.10.248; azl3 kernel 6.6.119.3-3 on Azure Linux 3.0 6.6.121.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: NFSD: NFSv4 file creation neglects setting ACL An NFSv4 client that sets an ACL with a named principal during file creation retrieves the ACL afterwards, and finds that it is only a default ACL (based on the mode bits) and not the ACL that was requested during file creation. This violates RFC 8881 section 6.4.1.3: "the ACL attribute is set as given". The issue occurs in nfsd_create_setattr(), which calls nfsd_attrs_valid() to determine whether to call nfsd_setattr(). However, nfsd_attrs_valid() checks only for iattr changes and security labels, but not POSIX ACLs. When only an ACL is present, the function returns false, nfsd_setattr() is skipped, and the POSIX ACL is never applied to the inode. Subsequently, when the client retrieves the ACL, the server finds no POSIX ACL on the inode and returns one generated from the file's mode bits rather than returning the originally-specified ACL.

HighCVSS 8.0 · v3.1—No exploit Fix available
Published
Jan 13, 2026
Updated
Oct 19, 2026
EPSS
0.4% · 39th percentile

Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
32 / 40 · 8.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
8.0
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 6.0affected
    • c5409ce523af40d5c3019717bc5b4f72038d48be and later · before c182e1e0b7640f6bcc0c5ca8d473f7c57199ea3daffected · git
    • d52acd23a327cada5fb597591267cfc09f08bb1d and later · before 75f91534f9acdfef77f8fa094313b7806f801725affected · git
    • c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b and later · before 60dbdef2ebc2317266a385e4debdb1bb0e57afe1affected · git
    • c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b and later · before 381261f24f4e4b41521c0e5ef5cc0b9a786a9862affected · git
    • c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b and later · before bf4e671c651534a307ab2fabba4926116beef8c3affected · git
    • c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b and later · before 214b396480061cbc8b16f2c518b2add7fbfa5192affected · git
    • c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b and later · before 913f7cf77bf14c13cfea70e89bcb6d0b22239562affected · git
    • 5.10.220 and later · before 5.10.248affected · semver
    • 5.15.154 and later · before 5.15.198affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.3-16.18.3-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2025-68800Jan 13, 2026 · mlxsw: spectrum_mr: Fix use-after-free when updating multicast route stats
    31Monitor
  • ← EarlierCVE-2025-68801Jan 13, 2026 · mlxsw: spectrum_router: Fix neighbour use-after-free
    31Monitor
  • Later →CVE-2025-68809Jan 13, 2026 · ksmbd: vfs: fix race on m_flags in vfs_cache
    36Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux214b396480061cbc8b16f2c518b2add7fbfa5192Vendor (CNA)
Linux Linux381261f24f4e4b41521c0e5ef5cc0b9a786a9862Vendor (CNA)
Linux Linux5.10.248Vendor (CNA)
Linux Linux5.15.198Vendor (CNA)
Linux Linux60dbdef2ebc2317266a385e4debdb1bb0e57afe1Vendor (CNA)
Linux Linux75f91534f9acdfef77f8fa094313b7806f801725Vendor (CNA)
Linux Linux913f7cf77bf14c13cfea70e89bcb6d0b22239562Vendor (CNA)
Linux Linuxbf4e671c651534a307ab2fabba4926116beef8c3Vendor (CNA)
Linux Linuxc182e1e0b7640f6bcc0c5ca8d473f7c57199ea3dVendor (CNA)
azl3 kernel 6.6.119.3-3 on Azure Linux 3.06.6.121.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.162-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-68432211 days apartvxlan: require CAP_NET_ADMIN in the device netns for changelink
    35Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-863 · Incorrect Authorization

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records