CVE-2024-41077

Kernel crash via invalid null_blk block size

Published Jul 29, 2024 · Updated May 11, 2026

NULL pointer dereference in null_blk in affected Linux kernel branches beginning with 4.14 allows local users to crash the kernel. The null_blk module accepts bs=1536 without enforcing the required 512-to-PAGE_SIZE power-of-two constraint, causing a null pointer dereference during initialization. Loading the driver with a nonconforming module parameter requires local administrative control and interrupts the host by triggering a kernel Oops.

CVSS severity5.5
Medium
EPSS probability0.22%
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 null_blk in affected Linux kernel branches beginning with 4.14 allows local users to crash the kernel. The null_blk module accepts bs=1536 without enforcing the required 512-to-PAGE_SIZE power-of-two constraint, causing a null pointer dereference during initialization. Loading the driver with a nonconforming module parameter requires local administrative control and interrupts the host by triggering a kernel Oops.

The record

CVE
CVE-2024-41077
Published
Jul 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 29, 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=4.14
  2. Affected versionversion=cedcafad8277b3a07e90bf2f68fff5c6b28a183e <08f03186b96e25e3154916a2e70732557c770ea7
  3. Affected versionversion=cedcafad8277b3a07e90bf2f68fff5c6b28a183e <2772ed2fc075eef7df3789906fc9dae01e4e132e
  4. Affected versionversion=cedcafad8277b3a07e90bf2f68fff5c6b28a183e <9625afe1dd4a158a14bb50f81af9e2dac634c0b1
  5. Affected versionversion=cedcafad8277b3a07e90bf2f68fff5c6b28a183e <9b873bdaae64bddade9d8c6df23c8a31948d47d0
  6. Affected versionversion=cedcafad8277b3a07e90bf2f68fff5c6b28a183e <c462ecd659b5fce731f1d592285832fd6ad54053
  7. Affected versionversion=cedcafad8277b3a07e90bf2f68fff5c6b28a183e <f92409a9da02f27d05d713bff5f865e386cef9b3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4.14; version=cedcafad8277b3a07e90bf2f68fff5c6b28a183e <08f03186b96e25e3154916a2e70732557c770ea7; version=cedcafad8277b3a07e90bf2f68fff5c6b28a183e <2772ed2fc075eef7df3789906fc9dae01e4e132e; version=cedcafad8277b3a07e90bf2f68fff5c6b28a183e <9625afe1dd4a158a14bb50f81af9e2dac634c0b1; version=cedcafad8277b3a07e90bf2f68fff5c6b28a183e <9b873bdaae64bddade9d8c6df23c8a31948d47d0; version=cedcafad8277b3a07e90bf2f68fff5c6b28a183e <c462ecd659b5fce731f1d592285832fd6ad54053; version=cedcafad8277b3a07e90bf2f68fff5c6b28a183e <f92409a9da02f27d05d713bff5f865e386cef9b3

Published CVSS scores

4.4Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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