CVE-2024-43826

Kernel crash via unsafe NFS folio length

Published Aug 17, 2024 · Updated May 11, 2026

NULL pointer dereference in Linux kernel 6.3 through 6.10.2 allows local users to crash the kernel through enabled NFS tracepoints. NFS trace events call nfs_folio_length without locking the folio or checking whether truncation cleared its f_mapping pointer, so the lookup can dereference NULL. Triggering the failure requires the affected kernel's NFS code, enabled NFS tracepoints, and a concurrent truncation condition; the bounded consequence is a host crash.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux kernel 6.3 through 6.10.2 allows local users to crash the kernel through enabled NFS tracepoints. NFS trace events call nfs_folio_length without locking the folio or checking whether truncation cleared its f_mapping pointer, so the lookup can dereference NULL. Triggering the failure requires the affected kernel's NFS code, enabled NFS tracepoints, and a concurrent truncation condition; the bounded consequence is a host crash.

The record

CVE
CVE-2024-43826
Published
Aug 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.3
  2. Affected versionversion=eb5654b3b89d5e836312cea9f3fdb49457852e89 <1562138b9cababf637eee485e98491f9206a990d
  3. Affected versionversion=eb5654b3b89d5e836312cea9f3fdb49457852e89 <387e6e9d110250946df4d4ebef9c2def5c7a4722
  4. Affected versionversion=eb5654b3b89d5e836312cea9f3fdb49457852e89 <fada32ed6dbc748f447c8d050a961b75d946055a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.3; version=eb5654b3b89d5e836312cea9f3fdb49457852e89 <1562138b9cababf637eee485e98491f9206a990d; version=eb5654b3b89d5e836312cea9f3fdb49457852e89 <387e6e9d110250946df4d4ebef9c2def5c7a4722; version=eb5654b3b89d5e836312cea9f3fdb49457852e89 <fada32ed6dbc748f447c8d050a961b75d946055a

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS: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.

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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