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NVD / CVE Program· CNA Linux

CVE-2025-40324: NFSD: Fix crash in nfsd4_read_release()

Noroxi assessment

Priority: Monitor (action score 30/100)

  • 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: 0.45% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Linux Linux 03524ccff698d4a77d096ed529073d91f5edee5d, 2ac46606b2cc49e78d8e3d8f2685e79e9ba73020, 375fdd8993cecc48afa359728a6e70b280dde1c8.

Low priority for now. Upgrade to Linux Linux 03524ccff698d4a77d096ed529073d91f5edee5d, 2ac46606b2cc49e78d8e3d8f2685e79e9ba73020, 375fdd8993cecc48afa359728a6e70b280dde1c8 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: Fix crash in nfsd4_read_release() When tracing is enabled, the trace_nfsd_read_done trace point crashes during the pynfs read.testNoFh test.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Dec 8, 2025
Updated
Oct 15, 2026
EPSS
0.4% · 39th percentile
CWE
—

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.5
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.

Get told when this record changes

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-40324

When you'll hear from us

  • when it enters CISA KEV
  • 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

    • 3d0dcada384af22dec764c8374a2997870ec86ae, 6.3affected
    • 65a33135e91e6dd661ecdf1194b9d90c49ae3570 and later · before 930cb4fe3ab4061be31f20ee30bb72a66f7bb6d1affected · git
    • b11d8162c24af4a351d21e2c804d25ca493305e3 and later · before 375fdd8993cecc48afa359728a6e70b280dde1c8affected · git
    • b623a8e5d38a69a3ef8644acb1030dd7c7bc28b3 and later · before 2ac46606b2cc49e78d8e3d8f2685e79e9ba73020affected · git
    • 15a8b55dbb1ba154d82627547c5761cac884d810 and later · before 03524ccff698d4a77d096ed529073d91f5edee5daffected · git
    • 15a8b55dbb1ba154d82627547c5761cac884d810 and later · before a4948875ed0599c037dc438c11891c9012721b1daffected · git
    • 15a8b55dbb1ba154d82627547c5761cac884d810 and later · before 8f244b773c63fa480c9a3bd1ae04f5272f285e89affected · git
    • 15a8b55dbb1ba154d82627547c5761cac884d810 and later · before abb1f08a2121dd270193746e43b2a9373db9ad84affected · git
    • 5.10.220 and later · before 5.10.247affected · semver
    • 5.15.154 and later · before 5.15.197affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.159-16.1.159-1
Debian:13linuxbefore 6.12.63-16.12.63-1
Debian:14linuxbefore 6.17.8-16.17.8-1

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-2025-40322Dec 8, 2025 · fbdev: bitblit: bound-check glyph index in bit_putcs*
    28Monitor
  • ← EarlierCVE-2025-40323Dec 8, 2025 · fbcon: Set fb_display[i]->mode to NULL when the mode is released
    31Monitor
  • Later →CVE-2025-40326Dec 8, 2025 · NFSD: Define actions for the new time_deleg FATTR4 attributes
    30Monitor

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 Linux03524ccff698d4a77d096ed529073d91f5edee5dVendor (CNA)
Linux Linux2ac46606b2cc49e78d8e3d8f2685e79e9ba73020Vendor (CNA)
Linux Linux375fdd8993cecc48afa359728a6e70b280dde1c8Vendor (CNA)
Linux Linux5.10.247Vendor (CNA)
Linux Linux5.15.197Vendor (CNA)
Linux Linux6.1.159Vendor (CNA)
Linux Linux6.3Vendor (CNA)
Linux Linux8f244b773c63fa480c9a3bd1ae04f5272f285e89Vendor (CNA)
Linux Linux930cb4fe3ab4061be31f20ee30bb72a66f7bb6d1Vendor (CNA)
Linux Linuxa4948875ed0599c037dc438c11891c9012721b1dVendor (CNA)
Linux Linuxabb1f08a2121dd270193746e43b2a9373db9ad84Vendor (CNA)
debian:linux6.1.159-1 · 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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.

No nightly-computed relations.

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.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 (6 more)

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

All records