CVE-2024-46690

Service interruption via misidentified third-party lease

Published Sep 13, 2024 · Updated Aug 5, 2026

Improper pointer validation in Linux kernel 6.9 through 6.10.7 allows local users to interrupt service through an nfsd lease conflict. In fs/nfsd/nfs4state.c, nfsd4_deleg_getattr_conflict() checks fl_lmops but still treats flc_owner from a third-party lease as an nfs4_delegation and dereferences it. Reachability requires local low-privileged access and the nfsd path to encounter a conflicting third-party lease; the published impact is limited to availability.

CVSS severity5.5
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper pointer validation in Linux kernel 6.9 through 6.10.7 allows local users to interrupt service through an nfsd lease conflict. In fs/nfsd/nfs4state.c, nfsd4_deleg_getattr_conflict() checks fl_lmops but still treats flc_owner from a third-party lease as an nfs4_delegation and dereferences it. Reachability requires local low-privileged access and the nfsd path to encounter a conflicting third-party lease; the published impact is limited to availability.

The record

CVE
CVE-2024-46690
Published
Sep 13, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 13, 2024CVE 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=6.9
  2. Affected versionversion=c5967721e1063648b0506481585ba7e2e49a075e <1b46a871e980e3daa16fd5e77539966492e8910a
  3. Affected versionversion=c5967721e1063648b0506481585ba7e2e49a075e <40927f3d0972bf86357a32a5749be71a551241b6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=c5967721e1063648b0506481585ba7e2e49a075e <1b46a871e980e3daa16fd5e77539966492e8910a; version=c5967721e1063648b0506481585ba7e2e49a075e <40927f3d0972bf86357a32a5749be71a551241b6

Published CVSS scores

5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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