CVE-2022-45887Public exploit

System crash via unreleased TTUSB frontend memory

Published Nov 25, 2022 · Updated Apr 25, 2025

Memory leak in the Linux kernel TTUSB DEC driver through 6.0.9 allows physically proximate attackers to crash the system via device removal. During ttusb_dec_exit_dvb(), device disconnection unregisters the frontend without calling dvb_frontend_detach(), so dvb_frontend_free() never releases its memory. Repeatedly connecting and disconnecting a Technotrend/Hauppauge USB DEC device exhausts kernel memory and causes a system crash.

CVSS severity4.7
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the Linux kernel TTUSB DEC driver through 6.0.9 allows physically proximate attackers to crash the system via device removal. During ttusb_dec_exit_dvb(), device disconnection unregisters the frontend without calling dvb_frontend_detach(), so dvb_frontend_free() never releases its memory. Repeatedly connecting and disconnecting a Technotrend/Hauppauge USB DEC device exhausts kernel memory and causes a system crash.

The record

CVE
CVE-2022-45887
Published
Nov 25, 2022
Updated
Apr 25, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-362, CWE-772, T1499
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Nov 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 25, 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 vectorphysical
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.7CISA-ADPCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7NIST NVDCVSS:3.1/AV:L/AC:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-772Missing Release of Resource after Effective Lifetime
T1499Endpoint Denial of Service

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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