CVE-2024-56632

Service interruption via leaked NVMe admin tag set

Published Dec 27, 2024 · Updated Aug 5, 2026

Memory leak in the nvme-tcp host driver in Linux 6.7 through 6.12.4 allows local users to interrupt service via failed controller creation. When the second nvme_tcp_configure_admin_queue call fails, nvme_tcp_setup_ctrl returns without teardown, leaving the admin queue's tag set allocated. Local access and the ability to initiate a failing NVMe/TCP controller setup are required; repeated failures exhaust kernel memory and can crash the host.

CVSS severity5.5
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the nvme-tcp host driver in Linux 6.7 through 6.12.4 allows local users to interrupt service via failed controller creation. When the second nvme_tcp_configure_admin_queue call fails, nvme_tcp_setup_ctrl returns without teardown, leaving the admin queue's tag set allocated. Local access and the ability to initiate a failing NVMe/TCP controller setup are required; repeated failures exhaust kernel memory and can crash the host.

The record

CVE
CVE-2024-56632
Published
Dec 27, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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

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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=6.7
  2. Affected versionversion=fd1418de10b9ca03d78404cf00a95138689ea369 <ceff9ac13a2478afddce85414d404e6aff6425f6
  3. Affected versionversion=fd1418de10b9ca03d78404cf00a95138689ea369 <fec55c29e54d3ca6fe9d7d7d9266098b4514fd34

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=fd1418de10b9ca03d78404cf00a95138689ea369 <ceff9ac13a2478afddce85414d404e6aff6425f6; version=fd1418de10b9ca03d78404cf00a95138689ea369 <fec55c29e54d3ca6fe9d7d7d9266098b4514fd34

Published CVSS scores

5.5CISA ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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-401Missing Release of Memory after Effective Lifetime
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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