CVE-2026-68456Public exploit

Denial of service via asynchronous firmware teardown race

Published Aug 15, 2026 · Updated Aug 15, 2026

Race condition in the ueagle-atm USB driver in Linux allows local users to interrupt service by unplugging a device during firmware loading. The probe path starts request_firmware_nowait(), but the disconnect handler tears down the device without waiting, letting firmware sysfs fallback create entries during removal. Triggering requires a ueagle-atm USB device, firmware fallback support, a failed direct firmware load, and control over disconnection timing; reported outcomes include kernel warnings and system instability.

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

Race condition in the ueagle-atm USB driver in Linux allows local users to interrupt service by unplugging a device during firmware loading. The probe path starts request_firmware_nowait(), but the disconnect handler tears down the device without waiting, letting firmware sysfs fallback create entries during removal. Triggering requires a ueagle-atm USB device, firmware fallback support, a failed direct firmware load, and control over disconnection timing; reported outcomes include kernel warnings and system instability.

The record

CVE
CVE-2026-68456
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-366, CWE-362, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=2.6.16
  2. Affected versionversion=b72458a80c75cab832248f536412f386e20a93a0 <509b51327320bdeaef1969248177a446ded073ab
  3. Affected versionversion=b72458a80c75cab832248f536412f386e20a93a0 <76861031b43a18065d13f9ffb8595d25c7576005
  4. Affected versionversion=b72458a80c75cab832248f536412f386e20a93a0 <bbfedc84714064ea4845e6b76f96316eb5bb65d8
  5. Affected versionversion=b72458a80c75cab832248f536412f386e20a93a0 <c581e30ae5b332d8acef64475a211b3f82099941
  6. Affected versionversion=b72458a80c75cab832248f536412f386e20a93a0 <d85f19aaef42a03e3e4765d659c761c8750a7f23
  7. Affected versionversion=b72458a80c75cab832248f536412f386e20a93a0 <ddcdac47e1f2651c7be60e299f98faf981522797
  8. Affected versionversion=b72458a80c75cab832248f536412f386e20a93a0 <e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf
  9. Affected versionversion=b72458a80c75cab832248f536412f386e20a93a0 <f2a6abc670104fc3e383ee3b1cf35c070485e3df

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.16; version=b72458a80c75cab832248f536412f386e20a93a0 <509b51327320bdeaef1969248177a446ded073ab; version=b72458a80c75cab832248f536412f386e20a93a0 <76861031b43a18065d13f9ffb8595d25c7576005; version=b72458a80c75cab832248f536412f386e20a93a0 <bbfedc84714064ea4845e6b76f96316eb5bb65d8; version=b72458a80c75cab832248f536412f386e20a93a0 <c581e30ae5b332d8acef64475a211b3f82099941; version=b72458a80c75cab832248f536412f386e20a93a0 <d85f19aaef42a03e3e4765d659c761c8750a7f23; version=b72458a80c75cab832248f536412f386e20a93a0 <ddcdac47e1f2651c7be60e299f98faf981522797; version=b72458a80c75cab832248f536412f386e20a93a0 <e2674dfbed8a30d57e2bc872c4bfa6c3eec918bf; version=b72458a80c75cab832248f536412f386e20a93a0 <f2a6abc670104fc3e383ee3b1cf35c070485e3df

Published CVSS scores

5.5Red HatCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-366Race Condition within a Thread
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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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