CVE-2024-56699

Kernel state corruption via double slot removal

Published Dec 28, 2024 · Updated May 11, 2026

Improper cleanup in Linux kernel 6.9 through 6.11.10 and 6.12 through 6.12.1 duplicates an s390 zPCI hotplug-slot removal. zpci_release_device() accepts configured or standby devices and calls zpci_exit_slot() even though standby teardown has already removed the slot. The path requires release in a non-reserved state that subsystem reference handling should prevent, and the published record establishes no attacker-controlled trigger or demonstrated impact beyond erroneous slot teardown.

CVSS severity7.8
High
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

Improper cleanup in Linux kernel 6.9 through 6.11.10 and 6.12 through 6.12.1 duplicates an s390 zPCI hotplug-slot removal. zpci_release_device() accepts configured or standby devices and calls zpci_exit_slot() even though standby teardown has already removed the slot. The path requires release in a non-reserved state that subsystem reference handling should prevent, and the published record establishes no attacker-controlled trigger or demonstrated impact beyond erroneous slot teardown.

The record

CVE
CVE-2024-56699
Published
Dec 28, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 28, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.9
  2. Affected versionversion=6ee600bfbe0f818ffb7748d99e9b0c89d0d9f02a <371bd905599d18da62d75e3974acbf6a41e315c7
  3. Affected versionversion=6ee600bfbe0f818ffb7748d99e9b0c89d0d9f02a <c1489651071ab1be46d2af1da8adb15c9fc3c069
  4. Affected versionversion=6ee600bfbe0f818ffb7748d99e9b0c89d0d9f02a <c4a585e952ca403a370586d3f16e8331a7564901

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=6ee600bfbe0f818ffb7748d99e9b0c89d0d9f02a <371bd905599d18da62d75e3974acbf6a41e315c7; version=6ee600bfbe0f818ffb7748d99e9b0c89d0d9f02a <c1489651071ab1be46d2af1da8adb15c9fc3c069; version=6ee600bfbe0f818ffb7748d99e9b0c89d0d9f02a <c4a585e952ca403a370586d3f16e8331a7564901

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
7.8Canonical Ubuntu SecurityCVSS: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

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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