CVE-2025-68312

Service interruption via uncanceled usbnet work

Published Dec 16, 2025 · Updated Dec 16, 2025

Workqueue lifetime flaw in Linux usbnet allows local users to interrupt service by unregistering an inactive USB network device. usbnet_link_change queues kevent work globally, but usbnet_disconnect skips ndo_stop when the interface is down and free_netdev frees the device without canceling that work. Exploitation requires local low-privileged access and an affected USB networking path; published assessments report availability impact only.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Workqueue lifetime flaw in Linux usbnet allows local users to interrupt service by unregistering an inactive USB network device. usbnet_link_change queues kevent work globally, but usbnet_disconnect skips ndo_stop when the interface is down and free_netdev frees the device without canceling that work. Exploitation requires local low-privileged access and an affected USB networking path; published assessments report availability impact only.

The record

CVE
CVE-2025-68312
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
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=135199a2edd459d2b123144efcd7f9bcd95128e4 <88a38b135d69f5db9024ff6527232f1b51be8915
  2. Affected versionversion=6.0
  3. Affected versionversion=635fd8953e4309b54ca6a81bed1d4a87668694f4 <43005002b60ef3424719ecda16d124714b45da3b
  4. Affected versionversion=7f77dcbc030c2faa6d8e8a594985eeb34018409e
  5. Affected versionversion=8b4588b8b00b299be16a35be67b331d8fdba03f3 <285d4b953f2ca03c358f986718dd89ee9bde632e
  6. Affected versionversion=a69e617e533edddf3fa3123149900f36e0a6dc74 <2ce1de32e05445d77fc056f6ff8339cfb78a5f84
  7. Affected versionversion=a69e617e533edddf3fa3123149900f36e0a6dc74 <3a10619fdefd3051aeb14860e4d4335529b4e94d
  8. Affected versionversion=a69e617e533edddf3fa3123149900f36e0a6dc74 <420c84c330d1688b8c764479e5738bbdbf0a33de
  9. Affected versionversion=a69e617e533edddf3fa3123149900f36e0a6dc74 <5158fb8da162e3982940f30cd01ed77bdf42c6fc
  10. Affected versionversion=a69e617e533edddf3fa3123149900f36e0a6dc74 <9a579d6a39513069d298eee70770bbac8a148565
  11. Affected versionversion=d2d6b530d89b0a912148018027386aa049f0a309
  12. Affected versionversion=d49bb8cf9bfaa06aa527eb30f1a52a071da2e32f
  13. Affected versionversion=db3b738ae5f726204876f4303c49cfdf4311403f
  14. Affected versionversion=e2a521a7dcc463c5017b4426ca0804e151faeff7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=135199a2edd459d2b123144efcd7f9bcd95128e4 <88a38b135d69f5db9024ff6527232f1b51be8915; version=6.0; version=635fd8953e4309b54ca6a81bed1d4a87668694f4 <43005002b60ef3424719ecda16d124714b45da3b; version=7f77dcbc030c2faa6d8e8a594985eeb34018409e; version=8b4588b8b00b299be16a35be67b331d8fdba03f3 <285d4b953f2ca03c358f986718dd89ee9bde632e; version=a69e617e533edddf3fa3123149900f36e0a6dc74 <2ce1de32e05445d77fc056f6ff8339cfb78a5f84; version=a69e617e533edddf3fa3123149900f36e0a6dc74 <3a10619fdefd3051aeb14860e4d4335529b4e94d; version=a69e617e533edddf3fa3123149900f36e0a6dc74 <420c84c330d1688b8c764479e5738bbdbf0a33de; version=a69e617e533edddf3fa3123149900f36e0a6dc74 <5158fb8da162e3982940f30cd01ed77bdf42c6fc; version=a69e617e533edddf3fa3123149900f36e0a6dc74 <9a579d6a39513069d298eee70770bbac8a148565; version=d2d6b530d89b0a912148018027386aa049f0a309; version=d49bb8cf9bfaa06aa527eb30f1a52a071da2e32f; version=db3b738ae5f726204876f4303c49cfdf4311403f; version=e2a521a7dcc463c5017b4426ca0804e151faeff7

Published CVSS scores

6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5SUSECVSS: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

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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