CVE-2024-26875

Kernel crash via pvrusb2 disconnect race

Published Apr 17, 2024 · Updated May 12, 2026

Use-after-free in the pvrusb2 USB-media driver in Linux allows local users with high privileges to crash the kernel during device disconnect. pvr2_context_disconnect sets disconnect_flag before completing teardown, allowing the context thread to free mp while pvr2_context_set_notify still reads it. Reaching the race requires high local privileges and a pvrusb2 device; the demonstrated consequence is a kernel crash.

CVSS severity6.4
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

Use-after-free in the pvrusb2 USB-media driver in Linux allows local users with high privileges to crash the kernel during device disconnect. pvr2_context_disconnect sets disconnect_flag before completing teardown, allowing the context thread to free mp while pvr2_context_set_notify still reads it. Reaching the race requires high local privileges and a pvrusb2 device; the demonstrated consequence is a kernel crash.

The record

CVE
CVE-2024-26875
Published
Apr 17, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-416, 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=2.6.26; version=e5be15c63804e05b5a94197524023702a259e308 <0a0b79ea55de8514e1750884e5fec77f9fdd01ee; version=e5be15c63804e05b5a94197524023702a259e308 <3a1ec89708d2e57e2712f46241282961b1a7a475; version=e5be15c63804e05b5a94197524023702a259e308 <40cd818fae875c424a8335009db33c7b5a07de3a; version=e5be15c63804e05b5a94197524023702a259e308 <8e60b99f6b7ccb3badeb512f5eb613ad45904592; version=e5be15c63804e05b5a94197524023702a259e308 <ab896d93fd6a2cd1afeb034c3cc9226cb499209f; version=e5be15c63804e05b5a94197524023702a259e308 <d29ed08964cec8b9729bc55c7bb23f679d7a18fb; version=e5be15c63804e05b5a94197524023702a259e308 <eaa410e05bdf562c90b23cdf2d9327f9c4625e16; version=e5be15c63804e05b5a94197524023702a259e308 <eb6e9dce979c08210ff7249e5e0eceb8991bfcd7; version=e5be15c63804e05b5a94197524023702a259e308 <ed8000e1e8e9684ab6c30cf2b526c0cea039929c
The Linux Kernel Organization · Linux Kernelversion=2.6.26; version=e5be15c63804 <0a0b79ea55de; version=e5be15c63804 <3a1ec89708d2; version=e5be15c63804 <40cd818fae87; version=e5be15c63804 <=8e60b99f6b7c; version=e5be15c63804 <ab896d93fd6a; version=e5be15c63804 <d29ed08964ce; version=e5be15c63804 <eaa410e05bdf; version=e5be15c63804 <eb6e9dce979c; version=e5be15c63804 <ed8000e1e8e9

Published CVSS scores

6.4CISACVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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-416Use After Free
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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