CVE-2024-39479

Kernel compromise via i915 hwmon use-after-free

Published Jul 5, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel's i915 hwmon component allows local users to compromise the kernel during device unbind. Two devres teardown paths can free hwmon driver data before the dependent hwmon device, leaving sysfs handlers to dereference released memory. Exploitation requires local low-privileged access and sysfs access during the device-unbind window, with confidentiality, integrity, and availability consequences.

CVSS severity7.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel's i915 hwmon component allows local users to compromise the kernel during device unbind. Two devres teardown paths can free hwmon driver data before the dependent hwmon device, leaving sysfs handlers to dereference released memory. Exploitation requires local low-privileged access and sysfs access during the device-unbind window, with confidentiality, integrity, and availability consequences.

The record

CVE
CVE-2024-39479
Published
Jul 5, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-400, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=6.2
  2. Affected versionversion=b3b088e28183b84080b7f0a0b8da84ec42b4b0e8 <5bc9de065b8bb9b8dd8799ecb4592d0403b54281
  3. Affected versionversion=b3b088e28183b84080b7f0a0b8da84ec42b4b0e8 <ce5a22d22db691d14516c3b8fdbf69139eb2ea8f
  4. Affected versionversion=b3b088e28183b84080b7f0a0b8da84ec42b4b0e8 <cfa73607eb21a4ce1d6294a2c5733628897b48a2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.2; version=b3b088e28183b84080b7f0a0b8da84ec42b4b0e8 <5bc9de065b8bb9b8dd8799ecb4592d0403b54281; version=b3b088e28183b84080b7f0a0b8da84ec42b4b0e8 <ce5a22d22db691d14516c3b8fdbf69139eb2ea8f; version=b3b088e28183b84080b7f0a0b8da84ec42b4b0e8 <cfa73607eb21a4ce1d6294a2c5733628897b48a2
The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f4 <5bc9de065b8b; version=1da177e4c3f4 <ce5a22d22db6; version=1da177e4c3f4 <cfa73607eb21

Published CVSS scores

7.8CISA-ADPCVSS: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.

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1068Exploitation for Privilege Escalation

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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