CVE-2024-26906

Kernel crash via misclassified vsyscall page fault

Published Apr 17, 2024 · Updated May 12, 2026

A kernel page-fault handling flaw in Linux allows local users to crash the system through a crafted eBPF program. copy_from_kernel_nofault treats the unreadable vsyscall address as user space, so SMAP prevents the eBPF fix-up and invokes page_fault_oops. Loading the eBPF program requires privileged access by default, and the reported consequence is a kernel oops that interrupts availability.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A kernel page-fault handling flaw in Linux allows local users to crash the system through a crafted eBPF program. copy_from_kernel_nofault treats the unreadable vsyscall address as user space, so SMAP prevents the eBPF fix-up and invokes page_fault_oops. Loading the eBPF program requires privileged access by default, and the reported consequence is a kernel oops that interrupts availability.

The record

CVE
CVE-2024-26906
Published
Apr 17, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=5.5; version=75a1a607bb7e6d918be3aca11ec2214a275392f4 <29bd6f86904682adafe9affbc7f79b14defcaff8; version=75a1a607bb7e6d918be3aca11ec2214a275392f4 <32019c659ecfe1d92e3bf9fcdfbb11a7c70acd58; version=75a1a607bb7e6d918be3aca11ec2214a275392f4 <57f78c46f08198e1be08ffe99c4c1ccc12855bf5; version=75a1a607bb7e6d918be3aca11ec2214a275392f4 <6e4694e65b6db4c3de125115dd4f55848cc48381; version=75a1a607bb7e6d918be3aca11ec2214a275392f4 <e8a67fe34b76a49320b33032228a794f40b0316b; version=75a1a607bb7e6d918be3aca11ec2214a275392f4 <f175de546a3eb77614d94d4c02550181c0a8493e

Published CVSS scores

5.5Oracle LinuxCVSS: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

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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