CVE-2024-50106Network attack vector

Kernel memory corruption via NFS delegation race

Published Nov 5, 2024 · Updated Aug 5, 2026

Use-after-free in Linux 6.9 through 6.11.5 allows remote attackers to corrupt kernel memory through concurrent NFSv4.1 operations. The NFSD laundromat marks a delegation state ID revoked without retaining exclusive state protection, while a racing FREE_STATEID removes and frees it before nfsd_breaker_owns_lease dereferences it. An unauthenticated client with TCP access to an enabled NFSv4.1 server can trigger the race, allowing kernel-data access, modification, or a service crash.

CVSS severity9.8
Critical
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux 6.9 through 6.11.5 allows remote attackers to corrupt kernel memory through concurrent NFSv4.1 operations. The NFSD laundromat marks a delegation state ID revoked without retaining exclusive state protection, while a racing FREE_STATEID removes and frees it before nfsd_breaker_owns_lease dereferences it. An unauthenticated client with TCP access to an enabled NFSv4.1 server can trigger the race, allowing kernel-data access, modification, or a service crash.

The record

CVE
CVE-2024-50106
Published
Nov 5, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 5, 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

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=6.9
  2. Affected versionversion=83e733161fde43e2f99cefa68e369944460fce39 <8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a
  3. Affected versionversion=83e733161fde43e2f99cefa68e369944460fce39 <967faa26f313a62e7bebc55d5b8122eaee43b929

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=83e733161fde43e2f99cefa68e369944460fce39 <8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a; version=83e733161fde43e2f99cefa68e369944460fce39 <967faa26f313a62e7bebc55d5b8122eaee43b929

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8Linux Kernel CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.0NIST NVDCVSS: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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1210Exploitation of Remote Services

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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