CVE-2025-68194

Kernel task hangs via unbounded iMON retries

Published Dec 16, 2025 · Updated Dec 16, 2025

Denial of service in the Linux iMON media driver allows local users to hang kernel tasks through USB transfer errors. The usb_rx_callback_intf0 function resubmits certain failed URBs indefinitely, while send_packet waits without a timeout when no receive callback completes the transfer. Exploitation requires access to an iMON-compatible USB device and control over error or callback behavior; the bounded consequence is stalled kernel work and service interruption.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux iMON media driver allows local users to hang kernel tasks through USB transfer errors. The usb_rx_callback_intf0 function resubmits certain failed URBs indefinitely, while send_packet waits without a timeout when no receive callback completes the transfer. Exploitation requires access to an iMON-compatible USB device and control over error or callback behavior; the bounded consequence is stalled kernel work and service interruption.

The record

CVE
CVE-2025-68194
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-835, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0213e4175abbb9dfcbf7c197e3817d527f459ad5
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <26f6a1dd5d81ad61a875a747698da6f27abf389b
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <519737af11c03590819a6eec2ad532cfdb87ea63
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <667afd4681781f60a644cd0d2ee6c59cb1c36208
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8231e80118463be5598daaf266c1c83650f1948b
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <eecd203ada43a4693ce6fdd3a58ae10c7819252c
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f58ab83b7b7133e6baefe03a46846c4f6ce45e2f
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f7f3ecb4934fff782fa9bb1cd16e2290c041b22d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0213e4175abbb9dfcbf7c197e3817d527f459ad5; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <26f6a1dd5d81ad61a875a747698da6f27abf389b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <519737af11c03590819a6eec2ad532cfdb87ea63; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <667afd4681781f60a644cd0d2ee6c59cb1c36208; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8231e80118463be5598daaf266c1c83650f1948b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <eecd203ada43a4693ce6fdd3a58ae10c7819252c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f58ab83b7b7133e6baefe03a46846c4f6ce45e2f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f7f3ecb4934fff782fa9bb1cd16e2290c041b22d

Published CVSS scores

5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon 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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
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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