CVE-2026-68410

Service interruption via leaked USB firmware images

Published Aug 10, 2026 · Updated Aug 10, 2026

Memory leakage in the Linux kernel Libertas USB firmware path allows local users to interrupt service through kernel memory exhaustion. helper_firmware_cb() retains the single-stage firmware image after lbs_fw_loaded() returns instead of releasing it after the successful asynchronous load. Reaching the leak requires compatible Libertas USB hardware and the firmware-download path; upstream reported no runtime hardware test.

CVSS severity4.7
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

Memory leakage in the Linux kernel Libertas USB firmware path allows local users to interrupt service through kernel memory exhaustion. helper_firmware_cb() retains the single-stage firmware image after lbs_fw_loaded() returns instead of releasing it after the successful asynchronous load. Reaching the leak requires compatible Libertas USB hardware and the firmware-download path; upstream reported no runtime hardware test.

The record

CVE
CVE-2026-68410
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772, T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=1dfba3060fe7ee03ccec25a91d35085142dfc295 <63c2391deefb31e1b801b7f32bd502ca4808639b
  2. Affected versionversion=1dfba3060fe7ee03ccec25a91d35085142dfc295 <644640cde2fb216e6567de5eee780a38dbc95928
  3. Affected versionversion=1dfba3060fe7ee03ccec25a91d35085142dfc295 <6cda91bbb8dc3d22ef0323008a12dcf73a5129da
  4. Affected versionversion=1dfba3060fe7ee03ccec25a91d35085142dfc295 <d497b7566e74920acfe283dd6b2cbf1682890796
  5. Affected versionversion=1dfba3060fe7ee03ccec25a91d35085142dfc295 <eaeb1d74a47fc4864f2c754c0b9d654a9b7dc55c
  6. Affected versionversion=3.13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1dfba3060fe7ee03ccec25a91d35085142dfc295 <63c2391deefb31e1b801b7f32bd502ca4808639b; version=1dfba3060fe7ee03ccec25a91d35085142dfc295 <644640cde2fb216e6567de5eee780a38dbc95928; version=1dfba3060fe7ee03ccec25a91d35085142dfc295 <6cda91bbb8dc3d22ef0323008a12dcf73a5129da; version=1dfba3060fe7ee03ccec25a91d35085142dfc295 <d497b7566e74920acfe283dd6b2cbf1682890796; version=1dfba3060fe7ee03ccec25a91d35085142dfc295 <eaeb1d74a47fc4864f2c754c0b9d654a9b7dc55c; version=3.13

Published CVSS scores

4.7Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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-772Missing Release of Resource after Effective Lifetime
T1499.001OS Exhaustion Flood

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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