CVE-2026-80642Hinoki check available

Use-after-free via uncounted incoming FLB references

Published Aug 28, 2026 · Updated Aug 28, 2026

Use-after-free in Linux 7.0 allows attackers to cause unspecified impact through incoming FLB data during Live Update. liveupdate_flb_get_incoming() returned a shared FLB object without increasing its reference count, allowing cleanup to free the object while a subsystem still used it. Reachability requires the Live Update feature to be enabled and a subsystem to retain the incoming object; no concrete crash, code-execution, or disclosure outcome is published.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Use-after-free in Linux 7.0 allows attackers to cause unspecified impact through incoming FLB data during Live Update. liveupdate_flb_get_incoming() returned a shared FLB object without increasing its reference count, allowing cleanup to free the object while a subsystem still used it. Reachability requires the Live Update feature to be enabled and a subsystem to retain the incoming object; no concrete crash, code-execution, or disclosure outcome is published.

The record

CVE
CVE-2026-80642
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=7.0
  2. Affected versionversion=cab056f2aae7250af50e503b81a80dfc567a1acd <725ada0273a0f48a67fd59cc518d7f8055fe3d5c
  3. Affected versionversion=cab056f2aae7250af50e503b81a80dfc567a1acd <d8e47bd066d7e626f9f45d416182d585b7e18b9b

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=7.0; version=cab056f2aae7250af50e503b81a80dfc567a1acd <725ada0273a0f48a67fd59cc518d7f8055fe3d5c; version=cab056f2aae7250af50e503b81a80dfc567a1acd <d8e47bd066d7e626f9f45d416182d585b7e18b9b

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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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