CVE-2022-43750Public exploit

Kernel crash via writable usbmon memory mappings

Published Oct 26, 2022 · Updated May 7, 2025

Memory corruption in Linux kernel usbmon before 5.19.15 and 6.0 allows local users to crash the kernel through a writable mapping. The mon_bin_mmap function accepted writable mappings of /dev/usbmon ring memory, allowing mapped user-space data to overwrite monitor internals. Opening and mapping /dev/usbmon requires elevated local privileges; corrupted ring data can trigger segfaults and use-after-free conditions.

CVSS severity6.7
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Linux kernel usbmon before 5.19.15 and 6.0 allows local users to crash the kernel through a writable mapping. The mon_bin_mmap function accepted writable mappings of /dev/usbmon ring memory, allowing mapped user-space data to overwrite monitor internals. Opening and mapping /dev/usbmon requires elevated local privileges; corrupted ring data can trigger segfaults and use-after-free conditions.

The record

CVE
CVE-2022-43750
Published
Oct 26, 2022
Updated
May 7, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 26, 2022CVE publishedPublication date reported by the CVE source.
  2. May 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.7NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.7CISA-ADPCVSS:3.1/AV:L/AC:L/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

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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

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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