CVE-2026-80826

Unspecified impact via premature URB giveback

Published Sep 4, 2026 · Updated Sep 4, 2026

Use-after-free in the c67x00 USB host-controller driver in Linux 2.6.26 and later allows attackers to cause unspecified impact. On final-packet TD creation failure, c67x00_add_iso_urb() gives back the isochronous URB before updating endpoint state, then reads freed URB data. Reaching the flaw requires that transfer-descriptor failure; Linux has not published a concrete security consequence or attacker-controlled trigger.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Use-after-free in the c67x00 USB host-controller driver in Linux 2.6.26 and later allows attackers to cause unspecified impact. On final-packet TD creation failure, c67x00_add_iso_urb() gives back the isochronous URB before updating endpoint state, then reads freed URB data. Reaching the flaw requires that transfer-descriptor failure; Linux has not published a concrete security consequence or attacker-controlled trigger.

The record

CVE
CVE-2026-80826
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=2.6.26
  2. Affected versionversion=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <62cd519ab74cac499036cd88c11692f8f0d53e14
  3. Affected versionversion=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <7983daa159981fac125db2457437723f38ea1472
  4. Affected versionversion=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <ade18b4ce78a16558f4f435aece80082f6f7b64c
  5. Affected versionversion=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <b1e24de475bf2d66fffc9103f3444b783527d55a
  6. Affected versionversion=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <b4cb8081cf80f82e48fbe9c021a8f6d0fa2ed421
  7. Affected versionversion=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <bb572801290e25ec1c4753d14af35777303f5d6b
  8. Affected versionversion=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <e4039e9bebb528dd9cd7ac72aeaec529c26c355a
  9. Affected versionversion=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <f24dcc61bd0ecf7639fac5bf700450b398d793a7
  10. Affected versionversion=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <ff172092cba7ec990ecc7b610ce703e19570b8f0

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.26; version=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <62cd519ab74cac499036cd88c11692f8f0d53e14; version=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <7983daa159981fac125db2457437723f38ea1472; version=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <ade18b4ce78a16558f4f435aece80082f6f7b64c; version=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <b1e24de475bf2d66fffc9103f3444b783527d55a; version=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <b4cb8081cf80f82e48fbe9c021a8f6d0fa2ed421; version=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <bb572801290e25ec1c4753d14af35777303f5d6b; version=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <e4039e9bebb528dd9cd7ac72aeaec529c26c355a; version=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <f24dcc61bd0ecf7639fac5bf700450b398d793a7; version=e9b29ffc519b9e63d4e1c0b1278bb951bb418a9d <ff172092cba7ec990ecc7b610ce703e19570b8f0

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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