CVE-2026-53286

Kernel memory corruption via probe cleanup fall-through

Published Jun 26, 2026 · Updated Jun 26, 2026

Double free in the idpf auxiliary-device probe path in Linux Kernel allows local users to crash affected systems during device setup. When auxiliary_device_add() fails, the error label calls auxiliary_device_uninit(), whose release callback frees iadev, then falls through to read adev->id and free iadev again. The path is reached only during failed idpf vport or core auxiliary-device addition; no method for forcing that failure has been published.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in the idpf auxiliary-device probe path in Linux Kernel allows local users to crash affected systems during device setup. When auxiliary_device_add() fails, the error label calls auxiliary_device_uninit(), whose release callback frees iadev, then falls through to read adev->id and free iadev again. The path is reached only during failed idpf vport or core auxiliary-device addition; no method for forcing that failure has been published.

The record

CVE
CVE-2026-53286
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-415, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 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=6.17
  2. Affected versionversion=f4312e6bfa2a98e94dacc75f96f916b76bdf4259 <6c77b9510829a424d1b74409b7db9456e3522871
  3. Affected versionversion=f4312e6bfa2a98e94dacc75f96f916b76bdf4259 <722b91d5086a249318c9d0e2b36aeac80ba8c808
  4. Affected versionversion=f4312e6bfa2a98e94dacc75f96f916b76bdf4259 <f319de7074e1728a9f9ff7134257360c694ec2b2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.17; version=f4312e6bfa2a98e94dacc75f96f916b76bdf4259 <6c77b9510829a424d1b74409b7db9456e3522871; version=f4312e6bfa2a98e94dacc75f96f916b76bdf4259 <722b91d5086a249318c9d0e2b36aeac80ba8c808; version=f4312e6bfa2a98e94dacc75f96f916b76bdf4259 <f319de7074e1728a9f9ff7134257360c694ec2b2

Published CVSS scores

7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-415Double Free
T1499.004Application or System Exploitation

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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