CVE-2026-74680

Kernel service disruption via active URB resubmission

Published Aug 22, 2026 · Updated Aug 22, 2026

Resource-lifecycle flaw in the Linux cxacru USB ATM driver allows local users to disrupt kernel operation during device initialization. On an early cxacru_cm() error, the driver returns without killing rcv_urb, then a later status poll resubmits the still-active request. The path requires compatible USB ATM hardware and a snd_urb error; the reported consequence is a kernel warning and availability loss.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource-lifecycle flaw in the Linux cxacru USB ATM driver allows local users to disrupt kernel operation during device initialization. On an early cxacru_cm() error, the driver returns without killing rcv_urb, then a later status poll resubmits the still-active request. The path requires compatible USB ATM hardware and a snd_urb error; the reported consequence is a kernel warning and availability loss.

The record

CVE
CVE-2026-74680
Published
Aug 22, 2026
Updated
Aug 22, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 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=1b0e614652344a2d39eb336f3dc07651782883bf <0af047703dbed8224552587ed436f14a24371b46
  2. Affected versionversion=1b0e614652344a2d39eb336f3dc07651782883bf <2f73a065791d2a8e3f0bdf29248e33600359e865
  3. Affected versionversion=1b0e614652344a2d39eb336f3dc07651782883bf <61093d7f1144f6a15bac505df35e5f535ade2ac1
  4. Affected versionversion=1b0e614652344a2d39eb336f3dc07651782883bf <6133b461058316e3ccba7331f974d110d4c08b23
  5. Affected versionversion=1b0e614652344a2d39eb336f3dc07651782883bf <645d98dbccdbfdbf0129f48822af7183492de091
  6. Affected versionversion=1b0e614652344a2d39eb336f3dc07651782883bf <939b6a41f681aea52af678053072ee443068e93e
  7. Affected versionversion=1b0e614652344a2d39eb336f3dc07651782883bf <993f7677949e3d72e360e86eed1f41c2511f75ed
  8. Affected versionversion=1b0e614652344a2d39eb336f3dc07651782883bf <c2f811314be351d86b6ab41e9297ae80d8da6f86
  9. Affected versionversion=2.6.13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1b0e614652344a2d39eb336f3dc07651782883bf <0af047703dbed8224552587ed436f14a24371b46; version=1b0e614652344a2d39eb336f3dc07651782883bf <2f73a065791d2a8e3f0bdf29248e33600359e865; version=1b0e614652344a2d39eb336f3dc07651782883bf <61093d7f1144f6a15bac505df35e5f535ade2ac1; version=1b0e614652344a2d39eb336f3dc07651782883bf <6133b461058316e3ccba7331f974d110d4c08b23; version=1b0e614652344a2d39eb336f3dc07651782883bf <645d98dbccdbfdbf0129f48822af7183492de091; version=1b0e614652344a2d39eb336f3dc07651782883bf <939b6a41f681aea52af678053072ee443068e93e; version=1b0e614652344a2d39eb336f3dc07651782883bf <993f7677949e3d72e360e86eed1f41c2511f75ed; version=1b0e614652344a2d39eb336f3dc07651782883bf <c2f811314be351d86b6ab41e9297ae80d8da6f86; version=2.6.13

Published CVSS scores

5.5Oracle 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

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-772Missing Release of Resource after Effective Lifetime
T1499Endpoint Denial of Service

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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